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  • A short-circuited coil is placed in a time-varying magnetic field. Electrical power is dissipated due to the current induced in the coil. If the number of turns were to be quadrupled and the wire r

A short-circuited coil is placed in a time-varying magnetic field. Electrical power is dissipated due to the current induced in the coil. If the number of turns were to be quadrupled and the wire radius halved, the electrical power dissipated would be

 

Option: 1

halved


Option: 2

the same


Option: 3

doubled


Option: 4

quadrupled


Answers (1)

best_answer

As number of turns are quadrupled, the induced emf will increase four times. Also,
resistance of coil increases sixteen times. Hence power \mathrm{\left(\frac{\varepsilon^2}{R}\right)} will not change.

Posted by

Ritika Kankaria

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