A cylindrical bar magnet of length 10 cm is kept along the axis of a circular
solenoid. If the magnet is rotated with an angular velocity of 2 radians per
second, the current induced in the coil is
a) 2 A b) 20 A c) 0 d) 10 A
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Answer:
When the magnet is rotated about its axis, the lines of force remain same and the flux through the coil doesn't change. Thus, there is no current induced in the coil.
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Explanation:
A cylindrical bar magnet of length 10 cm is kept along the axis of a circular
solenoid. If the magnet is rotated with an angular velocity of 2 radians per
second, the current induced in the coil is
a) 2 A b) 20 A c) 0 d) 10 A
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