An Induced Emf Is Observed in a Coil When a Permanent

question 62

Multiple Choice

An induced emf is observed in a coil when a permanent magnet is moved toward the coil, Figure a) . An induced emf is also observed when the coil is moved toward the magnet, Figure b) . Explain how the induced emf in both cases is in accord with Einstein's first postulate.

• A) The induced current in a) is in the clockwise direction, whereas it is in the anti-clockwise in b), indicating the difference in absolute motion.
• B) The induced current in a) is in the anti-clockwise direction, whereas it is in the clockwise in b), indicating the difference in absolute motion.
• C) The induced currents are in the clockwise direction for both cases, indicating that absolute motion cannot be detected.
• D) The induced currents are in the anti-clockwise direction for both cases, indicating that absolute motion cannot be detected.
• E) None of the above statements is correct.

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