A rectangular loop carrying a current $i$ is placed in a uniform magnetic field $B$. The area enclosed by the loop is $A$. If there are $n$ turns in the loop, the torque acting on the loop is given by

A

$ni(Aˉ×Bˉ)$

B

$ni(Aˉ.Bˉ)$

C

$ni(Aˉ×Bˉ) $

D

$ni(Aˉ.Bˉ) $

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Updated on : 2022-09-05

Solution

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Correct option is A)

$τ=M×B$ $=ni(A×B)$$(∵M=niA)$

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