Physics
An electron moves on a straight line path XY as shown. abcd is a coil adjacent to the path of electron. The direction of induced current, if any, in the coil will be :
- No curent is induced
- abcd
- adcb
- No fixed direction
Electro-Magnetism
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Answer
adcb
Reason — As the electron moves away, the magnetic flux through the coil decreases. By Lenz’s law, the induced current flows so as to oppose this decrease. That requires the coil to produce magnetic field into the plane of the paper, which is produced by a clockwise current. In the given diagram, clockwise is adcb.
Hence, the direction of induced current in the coil will be adcb.
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