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A straight solenoid of length 50cm has 1...

A straight solenoid of length `50cm` has `1000` turns and a mean cross sectional area of `2xx10^-4m^2`. It is placed with its axis at `30^@` with a uniform magnetic field of `0*31T`. Find the torque acting on the solenoid when a current of `2A` is passed through it.

Text Solution

Verified by Experts

Here, `l=50cm=1/2m`,
`N=1000, A=2xx10^-4m^2`
`theta=30^@, B=0*32T, tau=?, I=2A`
`tau=MB sin theta=(NIA)B sin theta`
`=1000xx2xx2xx10^-4xx0*32sin30^@`
`tau=0*064N-m`
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