"A galvanometer coil has 500 turns and each turn has an average area of 3 $\times$ 10–4 m2 . If a torque of 1.5 Nm is required to keep this coil parallel to a magnetic field when a current of 0.5 A is flowing through it, the strength of the field (in T) is ______."

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Accepted Answer

"Given N = 500

A = 3 $\times$ 10^–4 m²

$\tau$ = 1.5 Nm

i = 0.5 A

We know, $\tau = BINA\,sin\theta$

$1.5 = B \times 0.5 \times 500 \times 3 \times {10^{ - 4}}$

$B = {{10000} \over {500}} = 20$ Tesla"

A galvanometer coil has 500 turns and each turn has an average area of 3 $\times$ 10^–4 m² . If a torque of 1.5 Nm is required to keep this coil parallel to a magnetic field when a current of 0.5 A is flowing through it, the strength of the field (in T) is ______.

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A galvanometer coil has 500 turns and each turn has an average area of 3 $\times$ 10–4 m2 . If a torque of 1.5 Nm is required to keep this coil parallel to a magnetic field when a current of 0.5 A is flowing through it, the strength of the field (in T) is ______.

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A galvanometer coil has 500 turns and each turn has an average area of 3 $\times$ 10^–4 m² . If a torque of 1.5 Nm is required to keep this coil parallel to a magnetic field when a current of 0.5 A is flowing through it, the strength of the field (in T) is ______.