Z In each figure, a magnet is located beneath a conducting loop and along its central axis. A velocity vector drawn near the magnet indicates that the magnet is moving, and a velocity vector drawn near the loop indicates that the loop is oving. For each case, indicate the direction of the induced current in the wire loop. The clockwise and counterclockwise directions are defined with respect to an observer viewing the loop from below. 00 clockwise Answer Bank clockwise counterclockwise clockwise counterclockwise S counterclockwise S clockwise

In each of two coils the rate of change of the magnetic flux in a single loop is the same. The emf induced in coil 1, which has 245 loops, is 2.51 V. The emf induced in coil 2 is 4.90 V. How many loops does coil 2 have? Number i Units

*Chapter 30, Problem 033 GO The figure shows a rod of length L 8.84 cm that is forced to move at constant speed v 4.19 m/s along horizontal rails. The rod, ralls, and connecting strip at the right form a conducting loop. The rod has resistance 0.489 ; the rest of the loop has negligible resistance. A current / 145 A through the long straight wire at distance a = 14.9 mm from the loop sets up a (nonuniform) magnetic field throughout loop. Find the (a) magnitude of the emf and (b) current induced in the loop. (c) At what rate is thermal energy generated in the rod? (d) What is the magnitude of the force that must be applied to the rod to make it move at constant speed? (e) At what rate does this force do work on the rod? B. (a) Number 71 Units (b) Number -2 Units (c) Number 13 Units (d) Number 4 Units (e) Number s Units X XX

A motor run by a 7.8-V battery has a 15-tum square coil with sides of length 5.4 cm and total resistance 202. When spinning, the magnetic field felt by the wire in the coil is 0.028 T. ▼ Part A What is the maximum torque on the motor? Express your answer to two significant figures and include the appropriate units. T=4.7.10 4 μA Provide Feedback N Submit Previous Answers Request Answer MacBook Air m X Incorrect; Try Again; 3 attempts remaining 2 G Revie

There are a lot of numbers in this problem. Just about the only way to get it right is to work out each step symbolically first, and then plug numbers into the final symbolic result. Two coils of wire are aligned with their axes along the z-axis, as shown in the diagram. Coil 1 is connected to a power supply and conventional current flows clockwise through coil 1, as seen from the location of coil 2. Coil 2 is connected to a voltmeter. The distance between the centers of the coils is 0.18 m. Coil 1 has N1 = 540 turns of wire, and its radius is R1 = 0.09 m. The current through coil 1 is changing with time. At t=0 s, the current through coil 1 is Io = 18 A. At t=0.4 s, the current through coil 1 is Io.4 = 6 A. Coil 2 has N2 250 turns of wire, and its radius is R2 0.03 m. Inside coil 2, what is the direction of -dB/dt during this interval? ---Select--- What is the direction of the electric field inside the wire of coil 2, at a location on the top of coil 2? ---Select--- At time t=0, what…

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As a coil moves to the right at constant speed, it passes over the north pole of a magnet and then moves beyond it. Which graph best represents the current in the loop for the time of the motion? A counterclockwise current as viewed from above the loop is a positive current, clockwise is a negative current.

Two coils have the same number of circular turns and carry the same current. Each rotates in a magnetic field acting perpendicularly to its axis of rotation. Coil 1 has a radius of 4.6 cm and rotates in a 0.21-T field. Coil 2 rotates in a 0.54-T field. Each coil experiences the same maximum torque. What is the radius (in cm) of coil 2? Number i Units

A current I flows around the rectangular loop shown in the accompanying figure. B A D Write expressions for B . dl for the paths A, B , C and D A: B: C: D:

In the diagram below, a bar magnet moves toward a solenoid. Use Lenz's а. Law to find the direction of the induced current in the solenoid and then determine the direction of current flow through the resistor connected to the solenoid. Motion N The direction of the current through the resistor is: A. upward B. downwards In the diagram below, a solenoid moves toward a bar magnet. Use Lenz's Law to find the direction of b. the induced current in the solenoid and then determine the direction of current flow through the resistor connected to the solenoid. Motion The direction of the current through the resistor is: O A. upwards B. downwards