A metal rod of 25 cm length is moving at a speed of 0.5/sec in direction perpendicular to 0.25T magnetic field. Emf produced in the rod is_____________?
Correct answer: D. 0.03125 volt
- A. 0 volt
- B. 3.125 volt
- C. 31.25 volt
- D. 0.03125 volt
Explanation
For a rod moving perpendicular to a magnetic field, the motional emf is E = Blv = 0.25 × 0.25 × 0.5 = 0.03125 V. This assumes the stated speed is 0.5 m/s, as implied by the options.
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