The figure shows a bar moving to the right on two conducting rails.To make an induced current i in the direction indicated, a constant magnetic field between the rails should be in what direction?
A)Right
B)Left
C)Into the page
D)Out of the page
E)Impossible, cannot be done with a constant magnetic field

Question

The figure shows a bar moving to the right on two conducting rails.To make an induced current i in the direction indicated, a constant magnetic field between the rails should be in what direction? 
A)Right 
B)Left 
C)Into the page 
D)Out of the page 
E)Impossible, cannot be done with a constant magnetic field

Quizplus · Accepted Answer

According to Faraday's Law of Electromagnetic Induction, an electric current is induced in a conductor when it experiences a change in magnetic flux. In this scenario, as the bar moves to the right, it cuts through the magnetic field between the conducting rails. To induce an electric current in the direction indicated, the magnetic flux should be increasing into the page, which can only be achieved with a constant magnetic field directed into the page.

The Figure Shows a Bar Moving to the Right on Two