Question

The figure below pertains to questions 10.) and 11.). 

It illustrates a 15cm long conducting bar resting on zero-resistance wires. You begin exerting a force on the bar and thereby make it move at constant speed. While the bar is moving, a counterclockwise induced current is present in the conducting loop created by the bar and wires.

10.) Which of the following statements is false?

a.) You are moving the conducting bar to the right.

b.) The induced magnetic field through the center of the loop is directed into the page.

c.) The conducting bar experiences a magnetic force while you are moving it.

d.) The amount of emf induced depends on how fast the conducting bar is moving. e.) As you do work to move the bar with your force, energy is being dissipated by the resistor.

11.) If you are moving the bar 10m/s, what force are you exerting on the bar to keep it moving at this constant speed?

Answer 1

given

that the induced current is in counter clock wise direction as rod moving in the field is due to the rod is moving to the right .

10.
so among the options given , option B, is False

11. Bar is moving with constant speed 10 m/s , force acting on the bar is F = BIL

   the induced emg e = B*v*L = 0.1*10*0.15 = 0.15 V

now the induced current i = e/R = 0.15/1 = 0.15 A

   force on bar is F = BIL = 0.1*0.15*0.15 N = 0.00225 N = 2.25 mN