QUES. A long u shaped wire of width l placed in a perpendicular magnetic field B. A wire of length l is slide on the u shaped wire with a constant velocity u towards right. The resistance of all the wires is r per unit length . At t= 0 , the sliding wire is close to the left edge of the u shaped wire . Calculate the current in the circuit.
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UP 0 DOWN 0 0 1
1 Answers
1WE KNOW THAT e = VBL
AS AT T = O THE WIRE IS CLOSE TO THE LEFT EDGE . AS IT STARTS MOVING TOWARDS RIGHT WITH VELOCITY V.
TOTAL LENGTH = 2(L +VT)
NOW , RESISTANCE = r 2(l +vt)
current induced = e/r
= vBl /r2(l+vt)
