38.If 'W' Joule is the work done in rota...

38.If 'W' Joule is the work done in rotating the magnet from the field direction to a position that makes an angle `60^(@)`with the direction of the field,the torque required to hold the magnet in that direction is
1)`wN-m`2)` (W)/(2)N-m` 3)`(W)/(sqrt(3))N-m, ` 4)`sqrt(3)WN-m`

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38.If 'W' Joule is the work done in rotating the magnet from the field direction to a position that makes an angle `60^(@)`with the direction of the field,the torque required to hold the magnet in that direction is 1)`wN-m`2)` (W)/(2)N-m` 3)`(W)/(sqrt(3))N-m, ` 4)`sqrt(3)WN-m`

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38.If 'W' Joule is the work done in rotating the magnet from the field direction to a position that makes an angle `60^(@)`with the direction of the field,the torque required to hold the magnet in that direction is
1)`wN-m`2)` (W)/(2)N-m` 3)`(W)/(sqrt(3))N-m, ` 4)`sqrt(3)WN-m`