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The distance between the poles of a hors...

The distance between the poles of a horse shoe magnet is 0.1 m and its pole strength is 0.01 amp-m. The induction of magnetic field at a point midway between the poles will be

A

`2 xx 10^(-5)T`

B

`4 xx 10^(-6) T`

C

`8 xx 10^(-7)T`

D

zero

Text Solution

Verified by Experts

The correct Answer is:
C
`B= B_(N) + B_(S)= 2 xx (mu_(0))/(4pi).(q_(m))/(r^(2))`
`=2 xx 10^(-7) xx (0.01)/((0.1)/(2))^(2))= 8 xx 10^(-7)T`
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