A magnetic needle lying parallel to a magnetic field needs `2J` work to turn it through `60^@`. Calculate the torque required to maintain the needle in this position.

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

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

A magnetic needle lying parallel to a magnetic field requires X units of work to turn it through 60^(@) . The torque necessary to maintain the needle in this position is

A magnetic needle lying parallel to a magnetic field requires X units of work to turn it through 60^(@) . The torque necessary to maintain the needle in this position is

A magnetic needle lying parallel to the magnetic field required W units of work to turn it through an angle 45^@ The torque required to maintain the needle in this position will be