A straight conductor of length 0.4m moves at 7m/s perpendicular to a magnetic field of 0.9Wb/m². Find the induced emf across it:
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Question

A straight conductor of length 0.4m moves at 7m/s perpendicular to a magnetic field of 0.9Wb/m². Find the induced emf across it:

G1 Physics · Accepted Answer

Step 1: A straight moving conductor perpendicular to a constant magnetic field develops motional emf |ε| = Blv. Step 2: Given B = 0.9 Wb/m², conductor length ℓ = 0.4 m and speed v = 7 m/s. Step 3: ε = 0.9 × 0.4 × 7 = 2.52 V, answer B. Final answer: (B) 2.52V.