Question

In a region with a constant magnetic field as shown, there are two conducting frictionless horizontal rails, a resistor and some conducting wire along the left side and a conducting bar on the right side that is free to slide left or right. The bar is initially at rest but at time zero a force is applied to the bar pulling it to the right so that the distance s increases with time.

1. Use Faraday's Law to determine the magnitude of the induced emf in the loop. Assume the bar is moving at a speed v at that instant.

2. Determine the magnitude of the current passing through the resistor at that same instant.

3. Determine the rate at which energy is delivered to the resistor at that instant.

X X X X X X X X x Х x Х F. Applied L R WW x x Х Х Х S

Answer 1

X x rod starts from x rust E R. Now IS ..so Ut that? s- řat? area of loop ä perticular instante = Ls BLS at də BÀ वक dt - BL ds = ds -BLV e BLV lel lositeult con les R = į = BLV R 2 2 lep B² 22 v3 12 R Q = 3 p = R R