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Manipal Entrance Test 2019 Physics Paper

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Question : 49

Total: 50

A physicist works in a laboratory where the magnetic field is 2 T. She wears a necklace enclosing area 0.01m2 in such a way that the plane of the necklace is normal to the field and is having a resistance, R=0.01Ω . Because of power failure, the field decays to 1T in time 10−3s . Then what is the total heat produced in her necklace?

10 J
20 J
30 J
40 J

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