A solenoid has 2,000 turns wound over a ...

A solenoid has 2,000 turns wound over a length of 0.3m. the area of its cross-section is `1.2 xx 10^-3 m^2`. Around its central part, coil of 300 is wound. If a initial current of 2A is reversed in 0.25 s, the induced e.m.f. produced in the coil is

`6xx10^4V`

`4.8 xx 10^-2V`

`6 xx10^-2V`

48 V

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A solenoid has 2,000 turns wound over a length of 0.3 m. The area of its cross-section is 2 xx 10^-3 m^2 . A round its central part, a coil of 300 turns is wound. If an initial current of 2 A is reversed in 0.25 s, the induced e.m.f. produced in the coil is:

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