A physicist works in a laboratory where the mahgnetic field is `2T`. She wears a necklace enclosing area `0.01 m^(2)` in such a way that the plane of the necklace is normal to the field and is having a resistance `R=0.01Omega`. Because of power failure, the field decays to `1T` in time `10^(-3)` seconds. The what is the total heat produced in her necklace?`(T=tesla)`A. `10J`B. `20J`C. `30J`D. `40J`

A physicist works in a laboratory where the mahgnetic field is `2T`. S

1.	A physicist works in a laboratory where the mahgnetic field is `2T`. She wears a necklace enclosing area `0.01 m^(2)` in such a way that the plane of the necklace is normal to the field and is having a resistance `R=0.01Omega`. Because of power failure, the field decays to `1T` in time `10^(-3)` seconds. The what is the total heat produced in her necklace?`(T=tesla)`A. `10J`B. `20J`C. `30J`D. `40J`
Answer» Correct Answer - A `H=(V^(2)t)/(R )` and `V=(N(B_(2)-B_(1))Acostheta)/(t)` `V=(1xx(1-2)xx0.01xxcos0^(@))/(10^(-3))=10V`

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