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A magnet of magnetic moment 50 hat(i) A-...

A magnet of magnetic moment `50 hat(i) A-m^(2)` is placed along the x-axis in a magnetic field `vec(B)=(0.5hat(i)+3.0hat(j))T`. The torque acting on the magnet is

A

`175 hatk N-m`

B

`150 hatk N-m`

C

`75 hatk N-m`

D

`25sqrt(37) hatk N-m`

Text Solution

Verified by Experts

The correct Answer is:
B
`vectau = vecM xx vecB`
`=50hati xx (0.5 hati + 3hatj)`
`=150(hati xx hatj) = 150 hatk N-m`
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