Physics · Electromagnetic induction: Faraday's law, induced emf and current, Lenz's law, eddy currents, self and mutual inductance
A current is induced in a coil by electromagnetic induction.
A current is induced in a coil by electromagnetic induction.
- A. Only when coil moves in the magnetic field
- B. Only when a magnetic is moved into a coil
- C. Only when the coil and magnet move with respect to each other
- D. None of the above
Step-by-step solution
Electromagnetic induction occurs when the magnetic flux through a coil changes. This can happen not only by relative motion between coil and magnet (as in A, B, C) but also by changing the magnetic field strength, rotating the coil, or changing current in an adjacent coil. Therefore, none of the given restrictive statements is universally true.
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