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A copper wire having resistance 0.01 ohm...

A copper wire having resistance 0.01 ohm in each metre is used to wind a 400 turn solenoid of radius 1.0 cm and length 20 cm. Find the emf of a battery which when connected across the solenoid will cause a magnetic field of `(1.0 xx 10^-2)` T near the centre of the solenoid.

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The correct Answer is:
A
`E=IR` where `B=mu_(0)ni`
`=B/((mu_(0))N/02)xxTxxNxx2pir ,n=N/l` and `T` in the resistance per unit length
`=1V`
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