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Question
A rectangular coil of copper wires is rotated in a magnetic field. The direction of the induced current changes once in each______.
Options
two revolutions
one revolution
half revolution
one-fourth revolution
Solution
A rectangular coil of copper wires is rotated in a magnetic field. The direction of the induced current changes once in each half revolution.
Explanation:
If a rectangular coil of copper wire is rotated in a magnetic field, the direction of the magnetic field to the given side of the coil changes after half a revolution and the direction of the induced current also changes simultaneously.
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