A magnetic needle lying parallel to a magnetic field requires W units of work to turn it through 60°. The torque needed to maintain the needle in this position will be:

Magnetic Effects of Current and Magnetism: JEE Main 2003 Physics question

JEE Main 2003 · Annual, Paper 1 · Q7607

JEE Main 2003Annual, Paper 1PhysicsEasyMagnetic Effects of Current and Magnetism165× since 2002

A magnetic needle lying parallel to a magnetic field requires

W

units of work to turn it through

{60^ \circ }.

The torque needed to maintain the needle in this position will be :

JEE Main 2003 · Annual, Paper 1 · Q7607

JEE Main 2003Annual, Paper 1PhysicsEasyMagnetic Effects of Current and Magnetism165× since 2002

A magnetic needle lying parallel to a magnetic field requires

W

units of work to turn it through

{60^ \circ }.

The torque needed to maintain the needle in this position will be :