A current-carrying wire moves toward a coil A long straight wire carrying current / is moving with speed v toward a small circular coil of radius r containing N turns, which is attached to a voltmeter as shown. The long wire is in the plane of the coil. (Only a small portion of the wire is shown in the diagram.) Voltmeter N turns radius The radius of the coil is 0.02 m, and the coil has 11 turns. At a particular instant -5 amperes, v 3.1 meters per second, and the distance from the wire to the center of the coil x-0.17 m. (a) What is the magnitude of the rate of change of the magnetic field inside the coil? You will need to calculate this algebraically before you can get a number. Write an expression for the magnetic field due to the wire at the location of the coil. Use the approximate formula, since the wire is very long. Remember the chain rule, and remember that v dx/dt. dB/dt - (b) What is the magnitude of the voltmeter reading? Remember that this includes all 11 turns of the coil. T/s volts (e) What is the direction of dvat? into the page v (d) What is the direction of the curly electric field in the coll? counter-clockwise v

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Magnetic Force

A magnetic force arises when a charged particle or a current-carrying conductor is placed in a magnetic field. It is created because of the movement of the charged particles.