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A uniform conducting ring of mass `pi` kg and radius 1 m is kept on smooth horizontal table. A uniform but time varying magnetic field `B = (hat (i) + t^(2) hat (j))T` is present in the region, where t is time in seconds. Resistance of ring is `2 (Omega)`. Then Heat generated (in kJ) through the ring till the instant when ring start toppling isA. `1/(3pi)kJ`B. `2/(pi)kJ`C. `2/(3pi)kJ`D. `1/(pi)kJ` |
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Answer» Correct Answer - C Heat generated `H=int_(0)^(10//pi) I^(2)Rd=int_(0)^(10//pi) pi^(2)t^(2)xx2xxdt` `=2000/(3pi)J=2/(3pi)kJ` |
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