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Question
Two coils P and Q are lying a little distance apart coaxially. If a current I is suddenly set up anti-clockwise in the coil P then the direction of current induced in coil Q will be :
Two coils P and Q are lying a little distance apart coaxially. If a current I is suddenly set up anti-clockwise in the coil P then the direction of current induced in coil Q will be :
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Solution
The correct option is A clockwise
As current is flowing anti-clockwise in coil P, the coil produces a magnetic field similar to that of a bar magnet with north pole at the bottom surface of the coil. Thus magnetic field enters in the coil Q from bottom. Thus the induced current in coil Q would try to oppose the increase in flux, thus the current in coil Q induced would be clockwise.
As current is flowing anti-clockwise in coil P, the coil produces a magnetic field similar to that of a bar magnet with north pole at the bottom surface of the coil. Thus magnetic field enters in the coil Q from bottom. Thus the induced current in coil Q would try to oppose the increase in flux, thus the current in coil Q induced would be clockwise.
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