A conducting rod is free to slide on horizontal metal rails without friction. At a particular time, it is sliding with velocity v to the right, as shown. A uniform magnetic field B is directed into the page, the separation of the rails is L, and the resistance of the circuit is R. In what direction in the diagram is the current flowing in the resistor at this time?
A) up
B) down
C) up then down
D) down then up
E) Insufficient information given.

Question

A conducting rod is free to slide on horizontal metal rails without friction. At a particular time, it is sliding with velocity v to the right, as shown. A uniform magnetic field B is directed into the page, the separation of the rails is L, and the resistance of the circuit is R. In what direction in the diagram is the current flowing in the resistor at this time? 
A) up 
B) down 
C) up then down 
D) down then up 
E) Insufficient information given.

Quizplus · Accepted Answer

The Answer of A conducting rod is free to slide on horizontal metal rails without friction. At a particular time, it is sliding with velocity v to the right, as shown. A uniform magnetic field B is directed into the page, the separation of the rails is L, and the resistance of the circuit is R. In what direction in the diagram is the current flowing in the resistor at this time? 
A) up 
B) down 
C) up then down 
D) down then up 
E) Insufficient information given.

A Conducting Rod Is Free to Slide on Horizontal Metal