Problem 5 A rectangular loop of length a = 25 cm and total resistance 0.075 is pulled to the left at a constant speed of 15 cm/s, as shown below. The magnetic field B has a magnitude of 1.8 T and is directed into the page. (a) (b) (c) X X X X X X X X X X X X X X X V← X X x X X X X X X X X X Xx b a Using Faraday's Law, calculate the magnitude of the induced current in the circuit. (Note: You must show your work; simply plugging numbers into a result derived in class is not enough!) Using Lenz's Law and stating your reasoning, determine the general direction of the induced current in the loop. Then, using the right-hand rule, determine the specific direction of the magnetic force on the left edge of the loop. Find the magnitude of the applied force required to pull the loop leftward at constant speed.

Problem 5 A rectangular loop of length a = 25 cm and total resistance 0.075 is pulled to the left at a constant speed of 15 cm/s, as shown below. The magnetic field B has a magnitude of 1.8 T and is directed into the page. (a) (b) (c) X X X X X X X X X X X X X X X V← X X x X X X X X X X X X Xx b a Using Faraday's Law, calculate the magnitude of the induced current in the circuit. (Note: You must show your work; simply plugging numbers into a result derived in class is not enough!) Using Lenz's Law and stating your reasoning, determine the general direction of the induced current in the loop. Then, using the right-hand rule, determine the specific direction of the magnetic force on the left edge of the loop. Find the magnitude of the applied force required to pull the loop leftward at constant speed.

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter31: Faraday’s Law

Section: Chapter Questions

Problem 31.6OQ: The bar in Figure OQ31.6 moves on rails to the right with a velocity v,. and a uniform, constant...

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A wire of length 1.0 m is wound into a single-turn planar loop. The loop carries a current of 5.0 A, and it is placed in a uniform magnetic field of strength 0.25 T. (a) What is the maximum torque that the loop will experience if it is square? (b) If it is circular? (c) At what angle relative to B would die normal to the circular coil have to be oriented so that the torque on it would be the same as the maximum torque on the square coil?
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Consider the system pictured in Figure P28.26. A 15.0-cm horizontal wire of mass 15.0 g is placed between two thin, vertical conductors, and a uniform magnetic field acts perpendicular to the page. The wire is free to move vertically without friction on the two vertical conductors. When a 5.00-A current is directed as shown in the figure, the horizontal wire moves upward at constant velocity in the presence of gravity. (a) What forces act on the horizontal wire, and (b) under what condition is the wire able to move upward at constant velocity? (c) Find the magnitude and direction of the minimum magnetic Field required to move the wire at constant speed. (d) What happens if the magnetic field exceeds this minimum value? Figure P28.26
The bar in Figure OQ31.6 moves on rails to the right with a velocity v,. and a uniform, constant magnetic field is directed out of the page. Which of the following statements are correct? More than one statement may be correct. (a) The induced current in the loop is zero. (b) The induced current in the loop is clockwise. (c) The induced current in the loop is counterclockwise. (d) An external force is required to keep the bar moving at constant speed. (e) No force is required to keep the bar moving at constant speed.
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The conducting rod shown in the accompanying figure moves along parallel metal rails that are 25-cm apart. The system is in a uniform magnetic field of strength 0.75 T, which is directed into the page. The resistances of the rod and the rails are negligible, but the section PQ has a resistance of 0.25 . (a) What is the emf (including its sense) induced in the rod when it is moving to tire right with a speed of 5.0 m/s? (b) What force is required to keep the rod moving at this speed? (c) What is the rate at which work is done by this force? (d) What is the power dissipated in the resistor?
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