A Conducting Rod Is Sliding on Metal Rails with Velocity

question 5

Multiple Choice

A conducting rod is sliding on metal rails with velocity v.A magnetic field B is into the paper,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?

• A) up
• B) down
• C) up then down
• D) down then up
• E) Insufficient information given,