One meter long copper rod is moving with speed 20 m/sec in the magnetic field of strength 0.6 tesla. What is the value of induced emf?
Correct answer: B. 12 V
- A. 10 V
- B. 12 V
- C. 14 V
- D. 16 V
Explanation
Given: Magnetic field strength = B = 0.6 T Length = L = 1m Velocity = v = 20 m/s emf = ε = ? As we know that: emf = vBL = 20 × 0.6 × 1 emf = 12 v
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About Faraday's Law
Faraday's law states that an induced electromotive force equals the rate of change of magnetic flux linkage through a circuit. Questions cover changing field, area, angle or motion, the negative sign associated with Lenz's law, and the distinction between induced emf and the current that may flow in a closed circuit.
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