A physicist works in a laboratory where the magnetic field is 2 T. She wears a necklace…
Physics · JEE Main · NTA Exams — Electromagnetic Induction and Alternating Currents
A physicist works in a laboratory where the magnetic field is 2 T. She wears a necklace enclosing area 0.01 m2 in such a way that the plane of the necklace is normal to the field and is having a resistance R = 0.01 Ω. Because of power failure, the field decays to 1 T in time 10-3 sec. Then, what is the total heat produced in her necklace?
- 10 J
- 20 J
- 30 J
- 40 J
Answer
(A) 10 J
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