A rectangular coil of copper wires is rotated in a magnetic field. The direction of the induced current changes once in each
A
Two revolutions
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B
One revolution
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C
Half revolution
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D
One-fourth revolution
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Solution
The correct option is C
Half revolution
Half revolution:
Half of any revolution is a straight line whose angle is .
In every half cycle the direction of induced current changes in the coil when a rectangular copper coil is been placed in a magnetic field. Hence, the direction of the current didn't change.