The component of the external magnetic field along the central axis of a 33 turn circular coil of radius 27.0 cm decreases from 1.90 T to 0.400 T in 2.90 s. If the resistance of the coil is R = 6.00 52, what is the magnitude of the induced current in the coil? magnitude: What is the direction of the current if the axial component of the field points away from the viewer? O counter-clockwise
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- A current of 22.0 mA is maintained in a single circular loop of 4.00 m circumference. A magnetic field of 0.650 T is directed parallel to the plane of the loop. (a) Calculate the magnetic moment of the loop. mA m² (b) What is the magnitude of the torque exerted by the magnetic field on the loop? mN. mIn an electric motor, a coil with 104 turns of radius 1.90 cm can rotate between the poles of a magnet. The magnetic field magnitude is 0.200 T. When the current through the coil is 57.7 mA, what is the maximum torque that the motor can deliver? N.mThe component of the external magnetic field along the central axis of a 69 turn circular coil of radius 47.0 cm decreases from 2.90 T to 0.700 T in 2.10 s. If the resistance of the coil is R = 3.00 §, what is the magnitude of the induced current in the coil? magnitude: What is the direction of the current if the axial component of the field points away from the viewer? counter-clockwise clockwise A
- The plane of a flat, circular loop of wire is horizontal. An external magnetic field is directed perpendicular to the plane of the loop. The magnitude of the external magnetic field is increasing with time. Because of this increasing magnetic field, an induced current is flowing clockwise in the loop, as viewed from above. What is the direction of the magnetic field, assuming the situation is drawn on a sheet of paper? Tind O Left O Right O Into the page O Out of the page O Up the page O Down the page O Clockwise O CounterclockwiseA conductive bar is sliding to the right on the two conducting rails and current is induced in the circuit shown. a) What is the direction of the induced current? b) What is the direction of the force that the magnetic field exerts on the bar because of the induced current?A square current loop of 25.3 A is inscribed within a circular current loop A in the plane of the page. What must the current in the circular loop be such that the net magnetic field at the center of the system is zero if the radius of the circular loop is 0.04m? Assume that the magnetic fields produced by the loops are in opposing directions at the center of the system.
- Determine the current I flowing through a solenoid, if the magnetic flux inside its core is found to be 2.90 x 10-4 Wb. The radius of the solenoid is 25.0 cm and the number of turns per meter is 235. AYou have a solenoid with an initial current of 386 A and a turn density of 6088 What is the initial magnetic field through the solenoid? Binitial = 2.95 T The current in the solenoid drops to 51 A over the course of 1.1 ms. What is the final magnetic field through the solenoid? Bfinal = T Inside the solenoid is a coil with 75 loops and a radius of 9.0 cm. The coil is aligned so that the magnetic field from the solenoid passes through the coil perpendicular to the plane of the coil (directly down the center of the coil). What is the magnitude of the induced emf in the 75-turn coil at the center of the solenoid during this change in magnetic field? Enter you answer as a positive number. emf = V The coil has a resistance of 20 2. What is the current through the coil? Icoil A loops m = What is the power dissipated by the coil? Pcoil = W