Now move the compass needle in another position and repeat the same process. It has been found by experiments that the magnitude of the force (F) acting on the conductor is directly proportional to . What will be the affect on the magnetic force if we double all the parameters keeping sin 90? This is a standard equation to calculate magnetic force. Diagram by Jfmelero. Based on the direction of the current entering the coil in the electromagnets. Magnetic force on current-carrying conductors is used to convert electric energy to work. A charge is a basic property associated with the matter due to which it produces and experiences electrical and magnetic effects. Stretch the forefinger, central finger, and thumb of the left hand mutually perpendicular.Then if the forefinger points in the direction of the field (), the central finger in the direction of current I, the thumb will point in the direction of the force.. (See Figure . Correct option is B) The force experience by conductor is given by F=i(lBsin) In a current carrying conductor ,free electron move with a drift velocity and they feel magnetic force, but the positive ions are stationary ,so they don't feel any magnetic force.So net charge on current carrying conductor is zero. In a bar magnet, these lines are denser at the poles; hence the magnetic field at the poles will be greater than at the centre. Can I receive full notes of electromagnetism for a level course through my below email address. Solution. In the conducting rod, let the number consistency of portable electrons be given by n. Then the sum of the number of charge carriers is given by nAI, where I refer to the steady current in the rod. (c) Placing the magnets closer to each other to narrow the gap between the poles of . 13.5kN C. 1.35N D. 1.35kN Answer: B Hope you find this helpful. By using our site, you Experimentally, we found that a magnetic force acts on the moving charge and is given by F=q (v B). This means that the force on the conductor will be larger for a longer conductor. The battery you use every day in your TV remote or torch is made up of cells and is also known as a zinc-carbon cell. The magnitude of the force on a current carrying conductor increases when the strength of the magnetic held is increased. The direction of the force can be realized by the right-hand rule and the . Effects of Magnetic Force on a moving charge in the existence of Magnetic Field. Can you illustrate with some diagrams? It is based on the direction of current flowing in the conductor of the electromagnet. Moving current generates a magnetic field around it and behaves like a magnet, and a magnet experiences some force when placed in this magnetic field. Download our apps to start learning, Call us and we will answer all your questions about learning on Unacademy, Access free live classes and tests on the app, Kerala Plus One Result 2022: DHSE first year results declared, UPMSP Board (Uttar Pradesh Madhyamik Shiksha Parishad), The tangent drawn to the magnetic field lines provides the direction of the magnetic field, The closeness of the field lines is immediately proportionate to the strength of the field, Magnetic field lines seem to originate or start from the north pole and eliminate or merge at the south pole, The path of the magnetic field lines is from the south to the north pole Inside the magnet, Magnetic field lines do not bisect one another, Magnetic field lines construct a closed-loop, Magnetic field lines have both magnitude and direction at any point on the magnetic field. The directions in the equation are handled by the $\sin \theta$. and A|nqvd| = I, current through the conductor, This force in vector form can be written as. Read on to know more. Force on a Current-Carrying Conductor in Magnetic Field. They can be drawn using a compass needle. This is the force on a current-carrying conductor. This work is licensed by OpenStax University Physics under aCreative Commons Attribution License (by 4.0). Assalamu Alaikum dear brother! The force on current carrying wire is due to applied magnetic field or its own magnetic induction? They are characterized using magnetic field lines. A circular current-carrying conductor is affected by a magnetic field. Physics lab for 120 about force on a current conductor in a magnetic field. The absence of moving parts makes this attractive for moving a hot, chemically active substance, such as the liquid sodium employed in some nuclear reactors. It is called the magnetic Lorentz force. lab force on current carrying conductor in magnetic field data: wire length cm .02m Dismiss Try Ask an Expert F is force acting on a current carrying conductor,B is magnetic flux density (magnetic field strength), I is magnitude of current flowing through the conductor, l l is length of conductor, is angle that conductor makes with the magnetic field. In order to answer your question, we will have to go to the very basics. Link: http://en.wikipedia.org/wiki/File:ManoLaplace.svg. This is a standard equation to calculate magnetic force. The notes are good. I believe that you just stated the mathematical equation in your question? Understand the concepts of Zener diodes. From the hand rule, the direction of force is vertical and the field strength is horizontal. 2) A conductor has many free electrons. The magnetic force on a current-carrying wire in a magnetic field is given by F = I l B. Calculate the force between two charges having magnitude 3nC and 2nC separated by a distance of 2micro m. A. Now we will discuss the concept of the force as a result of the magnetic field in a straight current-carrying rod. The fields are generated or created when the electric current/charges move within the proximity of the magnet. Clarification: The force in a current carrying conductor is directly proportional to the product of the two charges and inversely proportional to the square of the distance between them. F = ILBsin = 10.10.5sin90F = 0.05 N. Example 2: A current-carrying conductor of length 0.5cm with current 2A is placed at an angle of 30 in the magnetic field of 0.3T. This depends on the way winding is done in the solenoid, loosely wound conductor in the presence of magnetic attract each other and act as one current carrying conductor. When sin = 1 (maximum) i.e., = 90, then force on the current element in a magnetic field is maximum (=ILB). zener diode is a very versatile semiconductor that is used for a variety of industrial processes and allows the flow of current in both directions.It can be used as a voltage regulator. The force acting on the current-carrying conductor is maximum when = 90 and the equation of force is. (See Motion of A Moving Charge In An Uniform Magnetic Field) Magnetic force on current-carrying conductors is used to convert electric energy to work. The force follows RHR-1 with the thumb in the direction of \(I\). Magnetic field lines construct a closed-loop. However, the force may or may not drop!! (b) Using two pairs of magnets with like poles side by side. Force acting on a charge moving in the magnetic field is called Lorentz force. The magnetic field is the vector field in the region of an electric current magnet or altering electric field where the magnetic forces are noticeable. This gave a new direction to the research on magnetism and its forces. A strong magnetic field is applied across a tube and a current is passed through the fluid at right angles to the field, resulting in a force on the fluid parallel to the tube axis as shown. Now we will discuss the concept of the force as a result of the magnetic field in a straight current-carrying rod. We will go through deeply about this equation in the following pages. (NCERT) Therefore, F B I l s i n . F = K B I l s i n . Resultantly the magnetic force is also experienced by the conductor. (Motors are a prime examplethey employ loops of wire and are considered in the next section.) Then, if the fingers point in the direction of fieldand the thumb in the direction of the current I, the normal to palm will point in the direction of the force. The deterrent value of nuclear submarines is based on their ability to hide and survive a first or second nuclear strike. Please I am looking for a physics and chemistry teacher Some characteristics of magnetic field lines are as follows: The magnetic field is commonly defined as an area where the force of magnetism works. zener diode is a very versatile semiconductor that is used for a variety of industrial processes and allows the flow of current in both directions.It can be used as a voltage regulator. ADD-ONS Place the compass needle in one direction on a piece of paper that is positioned near the magnet and mark the direction where the needle points. F = nAlqvdBsin F = n A l q v d B sin . where is the angle between the magnetic field and the conductor (if the magnetic field makes an angle other than 90 90 with the conductor). Magnetic field lines are a pictorial tool used to picture the strength and the direction of the magnetic field. This article contains study material notes on force on a current-carrying conductor, magnetic field, characteristics of a magnetic field, and magnetic field due to current-carrying wire. This force is the resultant of the forces acting on individual charged particles, which constitute the current. If I consider the conductor in the form of a current carrying loop that experiences a torque and further consider the moment arm, is it possible to replace the sin with a cos? (Motors are a prime examplethey employ loops of wire and are considered in the next section.) In this article, we have discussed the magnetic field and magnetic force. Also, learn about the efficiency and limitations of Zener Diode as a Voltage Regulator. isnt it should be the shorter the length of conductor in the magnetic field,the greater the force on the conductor? (See Figure 3.) Describe the effects of a magnetic force on a current-carrying conductor. When it is parallel to the magnetic field, the force will be zero. What is difference between magnet and magnetism, Magnet is a substace having a property of magnetism(to attract or repel as per the condition.). We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. Moving charges are responsible for establishing the magnetic field. Example 3: Find the length of the current-carrying conductor with 3A current which is placed at 90 in the magnetic field of 0.5T with 0.3 N force acting on it. What can be the reason behind this? The magnetic field is powerful at the poles because the field lines are heavier near the poles. (See Figure 5. . Force On A Current Carrying Conductor of Magnetics in Physics Class 12 Force On A Current Carrying Conductor Magnetics of Class 12 When a wire is placed in a magnetic field, it experiences no force. We contemplate a rod of identical length L and cross-sectional area A. Hence, L contains the length of the conductor (scalar part) and the direction of the conductor (vector part). The magnetic field is an area or an invisible space around a magnetic object or moving electric charge or material within which the force of magnetism works. For your second question, you are applying your knowledge incorrectly. Sir or maam can u plz write the mathematical equation for finding force on a current carrying conductor placed in a magnetic field or F=BIL sin theta. November 25, 2020 March 15, 2014 by . Force on a current-carrying conductor is given by F = (nAL)qvd B. For part a, since the current and magnetic field are perpendicular in this problem, we can simplify the formula to give us the magnitude and find the direction through the RHR-1. Force being a vector quantity, the component of that force in the direction drawn is the sine of the angle inclined at the horizontal lines. When the conductor is perpendicular to the magnetic field, the force will be maximum. This force of magnetism is typically generated as an outcome of shifting charges or some magnetic element. This will cause the coil to move to and fro according to the magnitude of the force. We contemplate a rod of identical length L and cross-sectional area A. The magnetic field is an area or an invisible space around a magnetic object or moving electric charge or material within which the force of magnetism works. Legal. Magnetic force on current-carrying conductors is used to convert electric energy to work. It says if we, stretch the fingers and thumb of the right hand at right angles to each other. Get subscription and access unlimited live and recorded courses from Indias best educators. Learn about the zeroth law definitions and their examples. The fields are generated or created when the electric current/charges move. To understand the calculation of the force on a current-carrying conductor, we need to understand the magnetic field. In the same way, the magnet also exerts a force on the current-carrying conductor, which Flemings left-hand rule can determine. $\theta$is angle that conductor makes with the magnetic field. Force on a current carrying conductor in a magnetic field (Hindi) | Physics | Khan Academy - YouTube #YouCanLearnAnything Force on a current carrying conductor in a magnetic field (Hindi) |. When a current-carrying conductor is in a magnetic field, it experiences a force as a result of the interaction between the magnetic field and the field (magnetic) produced by moving charges in the wire. Hope you have got some idea, Thanks! WHY L in the expression F=IL*B is a vector ?? A charge q is moving with the velocity v with an angle with the field direction. It is given by: School Guide: Roadmap For School Students, Data Structures & Algorithms- Self Paced Course, Magnetic Field due to Current carrying Conductor, Magnetic Force on a Current carrying Wire, Problems on Force between Two Parallel Current Carrying Conductors, Difference between Coulomb Force and Gravitational Force, Difference between Gravitational Force and Electrostatic Force, Flow of Electric Charges in a Metallic Conductor. Where, k is constant of proportionality and its value is unity in . Magnetic field lines do not bisect one another. (Just use $F = BIl$). We have introduced the concept of force on a current-carrying conductor, Characteristics of Magnetic Field, Magnetic Field, Magnetic Field due to current-carrying wire, and Magnetic Force. The magnetic field is established due to the force exerted by the flow of moving charges. Experimentally, we found that a magnetic force acts on the moving charge and is given by F=q (v x B). Existing MHD drives are heavy and inefficientmuch development work is needed. You know the expression of electric current, that is I = nqAvd I = n q A v d, so. Home A Level Electromagnetism (A Level) Force on A Current-carrying Conductor. Magnetic force on current-carrying conductors is used to convert electric energy to work. If this doesn't solve the problem, visit our Support Center . Sine of the angle i.e. Holding right hand thumb upward and remaining four finger closed, means current coming out of the conductor, and the four finger close in the anticlockwise direction and vice versa. Calculate the magnetic force on a current-carrying conductor. Why is sin theta used instead of cos theta when talking about the angle between B and L? The vector form of the formula for finding force on the current-carrying conductor is given by. Now we will discuss the concept of the force as a result of the magnetic field in a straight current-carrying rod. Referring to the diagram above, F is Force, B is Magnetic field, I is current. F = I lBsin = I l B (1) (1) F = I l B sin = I l . The conductor is perpendicular to the magnetic field. When sin = 0 (minimum) i.e., = 0 or 180, then force on the current element in a magnetic field is zero(minimum). Download our apps to start learning, Call us and we will answer all your questions about learning on Unacademy, Access free live classes and tests on the app, Kerala Plus One Result 2022: DHSE first year results declared, UPMSP Board (Uttar Pradesh Madhyamik Shiksha Parishad). As we slowly disassemble our nuclear weapons arsenals, the submarine branch will be the last to be decommissioned because of this ability (Figure \(\PageIndex{4}\)). This is the force on a current-carrying conductor. They indicate the direction of the magnetic field. Magnetic force is a force that occurs due to the interchange of magnetic fields. Force on a current-carrying conductor is given by F = (nAL)qvd B. I is magnitude of current flowing through the conductor. Here are the few things that you will need before we start: MHD propulsion for nuclear submarines has been proposed, because it could be considerably quieter than conventional propeller drives. This phenomenon is called the magnetic effect of current. Administrator of Mini Physics. There are some characteristics of magnetic field lines. To understand the calculation of the force on a current-carrying conductor, first, we need to understand the magnetic field. . The tangent drawn to the magnetic field lines provides the direction of the magnetic field. Learn about the concepts of the force on the current-carrying conductor, magnetic field, characteristics of a magnetic field, and magnetic field due to current-carrying wire. Thus, (Motors are a prime examplethey employ loops of wire and are considered in the next section.) When the current flows through the conductor kept in a magnetic field then the charges on the conductor are in motion so it experiences a force (Lorentz force). Cuz according to my knowledge,when the length of wire increases,the resistance increases too. Magnetic force on current-carrying conductors is used to convert electric energy to work. Example 2: A force of 0.25 N is exerted by a magnetic field on a wire of 8 cm length, which is carrying a current of 3 Ampere placed at right angles to the field. The path of the magnetic field lines is from the south to the north pole Inside the magnet. This force can easily be large enough to move the wire, since typical currents consist of very large numbers of moving charges. Magnetohydrodynamics (MHD) is the technical name given to a clever application where magnetic force pumps fluids without moving mechanical parts. The force on a current-carrying conductor is denoted as F = B i l sin and we know that = 90 F = 2 0.6 0.3 F = 0.36 N. So the force on the wire is 0.36N. The conductor has a huge number of electrons, and the current in the conductor means the drifting of free electrons in any of the fixed direction, as each electron experiences the magnetic force due to the motion of free electrons. And the force created in a magnetic field is called Magnetic Force. A straight current carrying conductor is placed in a magnetic field but no force acts on it. Force acting on a charge moving in a magnetic field is called Lorentz force. A magnetic field is an area surrounding magnetic objects. In A Levels, L represents the length of the conductor and hence, is treated as a scalar. F = ILBsin0.3 = 3L0.5sin90L = 0.3/1.5. Unacademy is Indias largest online learning platform. The drift velocity of each portable carrier is presumed to be assigned as vd. (But it is essentially a force on the moving free electrons). Thanks for your detailed and resourceful reply. When current is flowing through the conductor, a magnetic field is established around it. Magnetohydrodynamics (MHD) is the technical name given to a clever application where magnetic force pumps fluids without moving mechanical parts (Figure \(\PageIndex{3}\)). (Cell membranes, however, are affected by the large fields needed in MHD, delaying its practical application in humans.) Short Answer Type Questions: When is the force experienced by a current-carrying conductor placed in a magnetic field largest? The four fingers indicate the direction of flux created which will be perpendicular to the direction of current flow. Notify me of follow-up comments by email. This video explains force on a current carrying conductor.This is a product of Mexus Education Pvt. Verified by Toppr. Paul Peter Urone(Professor Emeritus at California State University, Sacramento) and Roger Hinrichs (State University of New York, College at Oswego) withContributing Authors: Kim Dirks (University of Auckland) andManjula Sharma (University of Sydney). Force on Current Carrying Conductor When the current flows through the conductor kept in a magnetic field then the charges on the conductor are in motion so it experiences a force (Lorentz force). 4. When we join the points, it indicates the magnetic field lines. Magnetic force on current-carrying conductors is used to convert electric energy to work. In the conducting rod, let the number density of portable electrons be given by n. . Because force is a the resultant of B and L is Force which is a vector quantity. Magnetic force on current-carrying conductors is used to convert electric energy to work. Read about the Zeroth law of thermodynamics. From 1), these moving free electrons will experience a force in a magnetic field. (See Figure 3.) In other words, a magnetic field can be described as the diffusion of magnetic force around a magnetic material or object. The viscosity or closeness of the field lines is immediately proportionate to the strength of the field. because it is a vector product deu to its direction, as it as vector product so vector angle which is sin is used correspondent to it, Because they are vector quantitity This field can originate inside the atoms of magnetic materials or within the electrical wires or conductors. This force is then interpreted as the force on a current-carrying conductor. Moving charges is an electric current that passes through a fixed point in a fixed period of time. Motors are a prime examplethey employ loops of wire and are considered in the next section. In 1820, HC Oersted proved that electric current creates a magnetic field. We can denote $n$ as the linear charge density (i.e. Why does a solenoid contract when a current is passed through it ? (Motors are a prime examplethey employ loops of wire and are considered in the next section.) This will depend on the magnitude of the drop in the current and the magnitude of increase of the length of the conductor. Magnetic field lines are imaginary lines found around a magnet that define the direction and strength of the magnetic field. Your question has no link to the current post. At a higher level (University/College), L is NOT the length of the conductor. They are characterized using field lines which is the pictorial tool. I will pay, Why magnetic field generate from N. pole & end in S.pole. Ok, the above explains your first question. We know that lightning is a kind of electricity and this provides proof that a compasss working is established on the Earths magnetic field. (Motors are a prime examplethey employ loops of wire and are considered in the next section.) 11.4 Magnetic Force on a Current-Carrying Conductor - University Physics Volume 2 | OpenStax Uh-oh, there's been a glitch We're not quite sure what went wrong. For example, the effect of lightning when it strikes a ship causes the breakdown of compass needles, disturbing the navigation system. When varying the current flows through the coil, a force of varying magnitudes will act on the coil. A charge q moves with the velocity v with an angle in the field direction. H. C. Oersted was the first scientist who discovered that a current-carrying conductor generates a magnetic impact around it. The current-carrying conductor generates a magnetic field. We see that, the conductor 1 experiences the same force due to the conductor 2 but the direction is opposite. Force on a current carrying conductor in a magnetic field H.A.Lorentz found that a charge moving in a magnetic field, in a direction other than the direction of magnetic field, experiences a force. We knew that lightning was a kind of electricity and also the proof that the working of a compass is established on the earths magnetic field. It can therefore be shown that the force on a current-carrying conductor is given by the expression. The magnetic force on current-carrying conductors is given by \[F = I l B \] where \(I\) is the current, and \(l\) the length of a straight conductor in a uniform magnetic field \(B\). Let's watch this amazing topic of "Force on a Current Carrying Conductor Placed in a Magnetic Field" with proper explanation, Abhishek Sir will explain about What is Force on a Current Carrying. Hence, they are characterised by a vector, They indicate the direction of the magnetic field, The magnetic field is powerful at the poles because the field lines are heavier near the poles. The thermal velocities of the free electrons are randomly oriented and so net force on them is zero. sin. Magnetohydrodynamics (MHD) is the technical name given to a clever application where magnetic force pumps fluids without moving mechanical parts. Magnetic force is a force that occurs due to the interchange of magnetic fields. 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Also, learn about the efficiency and limitations of Zener Diode as a Voltage Regulator. This indicated a relationship between the two, the magnetic field and the moving electric charge (current). $$\begin{aligned} F &\propto B \\ F &\propto I \\ F &\propto l \end{aligned}$$, From the third relationship ($F \propto l$) and $F = BIl$, we can say that the force on a current-carrying conductor will increase IF the length of the conductor increases AND the current and magnetic field strength REMAINS THE SAME. It can therefore be shown that the force on a current-carrying conductor is given by the expression (9.6.1) F = I l B where I is the current, l is the length of the conductor, and B is the strength of the magnetic field. Magnetohydrodynamics (MHD) is the technical name given to a clever application where magnetic force pumps fluids without moving mechanical parts. Why charge carrying conductor experiences a force even if it has net charge zero when kept in a magnetic field??? Magnetohydrodynamics (MHD) is the technical name given to a clever application where magnetic force pumps fluids without moving mechanical parts. The frequency of AC in India is 100Hz. Attempt Test: Force on Current Carrying Conductor | 10 questions in 10 minutes | Mock test for NEET preparation | Free important questions MCQ to study for NEET Exam | Download free PDF with solutions This is known as the Lorentz force law. The battery you use every day in your TV remote or torch is made up of cells and is also known as a zinc-carbon cell. Calculate the force acting on the wire when the wire makes an angle of (i) 90 (ii) 0 with respect to the magnetic field. If the angle is at the vertical line it would have been cos theta. { "9.01:_Prelude_to_Magnetism" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.
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The higher the current $\rightarrow$ the stronger the force. Vector form for the force acting on the current-carrying conductor is given by: Question 4: When the force on the current-carrying conductor is zero. (Motors are a prime examplethey employ loops of wire and are considered in the next section.) They are listed below: The magnetic field is commonly defined as an area where the force of magnetism works. 05146d70412a4074946765e3f927b3fe, 1065e6a54e1240e4bb2e00ac2d41b020 It can be both a repulsive and attractive force. Get all the important information related to the JEE Exam including the process of application, important calendar dates, eligibility criteria, exam centers etc. Hence considering cos instead of sin does not make sense. Available under the Creative Commons Attribution-Share Alike 3.0 Unported license. Experimental artificial hearts are testing with this technique for pumping blood, perhaps circumventing the adverse effects of mechanical pumps. A magnetic field illustrates how a moving charge flows around a magnetic object. Then, with the fingers in the direction of \(B\), a perpendicular to the palm points in the direction of \(F\), as in Figure 2. Loud Speaker. Furthermore, from 2), we know that more free electrons will be available for a longer conductor. Calculate the force acting on it. Application of the Force on a Current Carrying Conductor in a Magnetic Field - Loudspeaker. This field can originate inside the atoms of magnetic materials or within the electrical wires or conductors. F = I l B . In the conducting rod, let the number density of portable electrons be given by n. Then the sum of the number of charge carriers is given by nAI, where I refer to the steady current in the rod. Drive an expression for the magnitude of the force in a current-carry conductor in a magnetic field. The force on a segment of length L of the conductor 2 due to the conductor 1 can be given as, F 21 = I 2 L B 1 = 0 I 1 I 2 2 d L Similarly, we can calculate the force exerted by the conductor 2 on the conductor 1. Let, L is the length of the conductor, I is current flowing through it, q is the charges flowing through the conductor at the time 't', The direction of force is always perpendicular to the plane containingand. Michael Faraday observed this and believed that if an electric current can create a magnetic field, then a magnetic field can also create a current. The moving charge does not feel any force when parallel to the magnetic field. Kindly i am asking for references in my studies. The cross-product of L and B will give rise to the $\sin \theta$. Magnetohydrodynamics (MHD) is the technical name given to a clever application where magnetic force pumps fluids without moving mechanical parts. When the conducting rod is positioned in an outer magnetic field of magnitude B, the force pertained on the portable charges or the electrons can be given as: Where q refers to the value of charge on the mobile carrier. L represents the element of the current carrying conductor (that is in the magnetic field). In this article, we have discussed the force on a current-carrying conductor. In 1831, Faraday showed the world that if a magnet is moved inside a copper coil, very little electric current is induced. Use right hand thumb rule. Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. What if force is halfed effect on magnetic feild, This is really good of you people ,I benefit from your contribution. By the end of this section, you will be able to: Because charges ordinarily cannot escape a conductor, the magnetic force on charges moving in a conductor is transmitted to the conductor itself. Can i know why does the length of current-carrying conductor affect the force on conductor? number of free electrons per unit length of conductor), From 2), a current flowing through a conductor will essentially mean that free electrons are moving through the conductor. my question is why the longer the length of conductor in the magnetic field,the greater the force on the conductor? Dynamo is an example of an electric generator. A particular region in space around the magnet where the magnet has its magnetic effect is called the magnetic field of the magnet. Restart your browser. (i.e. Example 4: At what angle the current-carrying conductor of length 0.6cm with a current 2A is placed in the magnetic field of 0.2T with 0.24N force acting on it? For example, the effect of lightning when it strikes a ship causes the breakdown of compass needles, disturbing the navigation system. The direction of this force is given by RHR-1, with the thumb in the direction of the current \(I\). This indicates a relationship between the magnetic field and the moving electric charge (current). When a conductor carrying a current is placed in a magnetic field, the conductor experiences a magnetic force. A stronger magnetic field can be produced by: (a) Using more powerful magnets. Question 1: State Flemings Left Hand Rule. and A|nqvd| = I, the current through the conductor, This force in vector form can be written as. while L is the length of conductor and it is a scaler quantity . 1) A moving electron will experience a force in a magnetic field. The magnetic force, exerted on a current-carrying conductor by a magnetic field, is perpendicular to the plane, containing the current and the magnetic field. Read about the Zeroth law of thermodynamics. Question 3: Write the vector form for the force acting on the current-carrying conductor. It can be both a repulsive and attractive force. Unacademy is Indias largest online learning platform. I do not understand your question. A-143, 9th Floor, Sovereign Corporate Tower, We use cookies to ensure you have the best browsing experience on our website. Let, L is the length of the conductor,I is current flowing through it,q is the charges flowing through the conductor at the time t,v is the velocity of the charge q,B is a Uniform magnetic field in which current carrying conductor is placed, F = qvBsin (Now, q = I t, and v = L / t ), where, is the angle between L and BL is the length of the conductorI is current flowing through itB is a Uniform magnetic field. One of the important rules which are used in electrostatics is Flemings Left-hand Rule. Or. Hence sine theta. Understand the concepts of Zener diodes. In a magnetic field, the subatomic particles with the -ve charge. Ltd., an education innovations company based in Mumbai, I. A few special cases for finding force on the current carrying are. Magnetic field lines have both magnitude and direction at any point on the magnetic field. Magnetic field lines seem to originate or start from the north pole and eliminate or merge at the south pole. ALL other conditions REMAINS THE SAME), Of course, if the resistance increases due to an increase in the length of the conductor, the current will drop. Get subscription and access unlimited live and recorded courses from Indias best educators. Read on to know more. Fleming's left-hand rule can be used to determine the force's direction. It says if the forefinger, middle finger, and thumb of the left hand are stressed mutually perpendicular to each other such that the forefinger is along the direction of the magnetic field, the middle finger is along the direction of current then the thumb gives the direction of the force. It is given by: whereq is the charge,v is the velocity of the charge moving in a magnetic field,B is the magnetic field and is the angle between the charge and magnetic field. We have introduced the concept of force on a current-carrying conductor, Characteristics of Magnetic Field, Magnetic Field, Magnetic Field due to current-carrying wire, and Magnetic Force. I believe that you are in the wrong section. 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