A closely wound solenoid of 2000 turns and area of cross section `1.6xx10^-4m^2`
Channel: Doubtnut
Date: 2020-08-02

A closely wound solenoid of 2000 turns and area of cross section `1.6xx10^-4m^2`, carrying a current of `4amp.` is suspended through its centre allowing it to turn in a horizontal plane:  (a) What is the magnetic moment associated with the solenoid?  (b) What are the force and torque on the solenoid if a uniform horizontal magnetic field of `7*5xx10^-2T` is set up at an angle of `30^@` with the axis of the solenoid?