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

n i (¯ A \times ¯ B)

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n i (¯ A . ¯ B)

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\frac{i (¯ A \times ¯ B)}{n}

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\frac{i (¯ A . ¯ B)}{n}

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Solution

The correct option is A $n i (¯ A \times ¯ B)$
$\to τ = \to M \times \to B$
$= n i (\to A \times \to B)$ $(∵ \to M = n i \to A)$

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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

The correct option is A ni(¯A×¯B)→τ=→M×→B=ni(→A×→B) (∵→M=ni→A)

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

The correct option is A $n i (¯ A \times ¯ B)$
$\to τ = \to M \times \to B$
$= n i (\to A \times \to B)$ $(∵ \to M = n i \to A)$