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

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175 k^ N−m

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detailed solution

Correct option is B

τ→=M→×B→ ⇒τ→=50i^×0.5i^+3j^ ⇒τ→=150i^×j^ ∵i^×i^=0 ⇒τ→=150k^ ∵ i^×j^=k^

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A magnet of magnetic moment 50 i^ Am2 is placed along the x-axis in a magnetic field B→=0.5i^+3.0j^T . The torque acting on the magnet is

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