A wire loop is moved parallel to a uniform magnetic field. The induced emf in the loop will:
Correct answer: B. Be zero
- A. Be maximum
- B. Be zero
- C. Depend on the size of the coil
- D. None of above
Explanation
Since the coil is moving parallel to a uniform magnetic field, the magnetic flux associated with the coil will remain zero during the whole time. And as the magnetic flux associated with the coil is not changing during the motion, there will be no emf induced in the coil. Hence induced emf in the coil will be zero.
This question appeared on the ETEA MDCAT 2008 paper, which you can sit online with every answer explained.
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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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