An Induced Emf Is Observed in a Coil When a Permanent

question 10

Multiple Choice

An induced emf is observed in a coil when a permanent magnet is moved towards the coil, Figure (a) . An induced emf is also observed when the coil is moved towards the magnet, Figure (b) . Explain how the induced emf in both cases are 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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