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A straight line conductor of length 0.4 m is moved with a speed of 7 m s⁻¹ perpendicular to a magnetic field of intensity 0.9 Wb m⁻². The induced emf across the conductor is

Asked in NEET 1995 · Free conductor moving in a field

Answer: (4) 2.52 V

Step-by-step solution

ε=Bℓ v when the velocity, the field and the conductor are mutually

perpendicular, which they are here.

ε=0.9×0.4×7=2.52 V.

Why the other options are wrong

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