Q.

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

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a

175 k^ Nm

b

150 k^ Nm

c

75 k^ Nm

d

2537 k^ Nm

answer is B.

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Detailed Solution

τ→=M→ x B→⇒τ→=50i^ x 0.5i^+3j^150 i^ x j^ =150 k^ Nm
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A magnet of magnetic moment 50i^ Am2 is placed along the x-axis in a magnetic field  B→=0.5i^+3.0j^T. The torque acting on the magnet