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A bar magnet of length 10 cm and having the pole strength equal to $10^{- 3} Wb$ is kept in a magnetic field having magnetic induction (B) equal to $4 π x 10^{- 3} T$ . It makes an angle of $30^{o}$ with the direction of magnetic induction. The value of the torque acting on the magnet is

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2π x 10-7 Nm

2π x 10-5 Nm

0.5 Nm

0.5 x 102 Nm

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detailed solution

Correct option is A

Torque, τ = MB sinθ= 0.1 x l0-3 x 4π x10-3 x sin30o =10-7 x4π x 12= 2π x l0-7 N m

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A bar magnet of length 10 cm and having the pole strength equal to 10-3Wb is kept in a magnetic field having magnetic induction (B) equal to 4π x 10-3T. It makes an angle of 30o with the direction of magnetic induction. The value of the torque acting on the magnet is

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Ready to Test Your Skills?

free study material

A bar magnet of length 10 cm and having the pole strength equal to $10^{- 3} Wb$ is kept in a magnetic field having magnetic induction (B) equal to $4 π x 10^{- 3} T$ . It makes an angle of $30^{o}$ with the direction of magnetic induction. The value of the torque acting on the magnet is