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A flat coil carrying a current has a mag...

A flat coil carrying a current has a magnetic moment `vec(mu)`. It is placed in a magnetic field `vec(B)`. If the torque on the coil is `vec (tau)` then :

A

`vec(tau) = vec (mu) xx vec(B)`

B

`vec(tau) = vec(B) xx vec(mu)`

C

`|vec(tau)| = vec(mu) .vec(B)`

D

`vec(tau) =vec(mu) +vec(B)`

Text Solution

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The correct Answer is:
A
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