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7. A magnetic...

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7. A magnetic flux of 500 microWb per turn, passing through a solenoid of 200 turns, is reversed in direction in 20 milli sec, the average emf induced in thesolenoid is(1) 5 V (2) 2 V (3) 20 V (4) 10V

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Q. A magnetic flux of

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passing through a

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