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If a magnet of length 10cm and pole stre...

If a magnet of length `10cm` and pole strength `40 A-m` is placed at an angle of `45^(@)` in an uniform induction field of intensity `2xx10^(-4)T`, the couple acting on it is

A

`0.5656 xx 10^(4) N-m`

B

`0.5656 xx 10^(-3) N-m`

C

`0.656 xx 10^(-4) N-m`

D

`0.656 xx 10^(-5) N-m`

Text Solution

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The correct Answer is:
B
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