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If a current of 2A give rise a magnetic flux of 5 x 10-5 weber/turn through a coil having 100 turns, then the magnetic energy stored in the medium surroundin by the coil is:- (1) 5 joule (2) 5 x 10-7 joule (3) 5 x 10-3 joule (4) 0.5 joule

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