Genius Jnr - A magnetic needle, which is initially lying parallel to the magnetic field lines, turns through an angle 30° when W amount of work is done on it. The torque needed to maintain its new position will be

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04 Jan 2017

A magnetic needle, which is initially lying parallel to the magnetic field lines, turns through an angle 30° when W amount of work is done on it. The torque needed to maintain its new position will be

3.7 W

1.4 W

0.7 W

1 W

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