An Induced Emf Is Observed in a Coil When a Permanent

question 50

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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