-In the figure,a long bar slides on two contact points and is in motion with velocity ν.A steady,uniform,magnetic field B is present.The induced current through the resistor R is:
A)zero
B)from a to b
C)from b to a

Question

-In the figure,a long bar slides on two contact points and is in motion with velocity ν.A steady,uniform,magnetic field B is present.The induced current through the resistor R is:
A)zero 
B)from a to b 
C)from b to a

Quizplus · Accepted Answer

The magnetic field is perpendicular to the velocity of the bar, so the induced current will be in the direction of the magnetic field.

-In the Figure,a Long Bar Slides on Two Contact Points