A circuit area `0.01m^(2)` is kept inside a magnetic field which is normal to its plane. The magentic field changes form 2 tesla in 1 millisecond. If the resistance of the circuit is `2omega`. The rate of heat evolved isA. `5J//s`B. `50J//s`C. `0.05J//s`D. `0.5J//s`

A circuit area `0.01m^(2)` is kept inside a magnetic field which is no

1.	A circuit area `0.01m^(2)` is kept inside a magnetic field which is normal to its plane. The magentic field changes form 2 tesla in 1 millisecond. If the resistance of the circuit is `2omega`. The rate of heat evolved isA. `5J//s`B. `50J//s`C. `0.05J//s`D. `0.5J//s`
Answer» Correct Answer - B Induced emf `,e=(-dphi)/(dt)` `rArre=(-(phi_(2)-phi_(1)))/(t)=(-(0.01-0.02))/(1xx10^(-3))` `e=0.01xx10^(3)=10` volt. `V=IR or (10)/(2)=I:. I=5A` Rate of heat evolved `=I^(2)R=(5)^(2)xx2=25xx2=50J//s`

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A circuit area `0.01m^(2)` is kept inside a magnetic field which is normal to its plane. The magentic field changes form 2 tesla in 1 millisecond. If the resistance of the circuit is `2omega`. The rate of heat evolved isA. `5J//s`B. `50J//s`C. `0.05J//s`D. `0.5J//s`

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