A closely wound solenoid of 2000 turns and area of cross-section 1.6 xx 10^(-4) m^2, carrying a current of 4.0 A, 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 is the force and torque on the solenoid if a uniform horizontal magnetic field of 7.5 xx 10^(-21) T is set up at an angle of 30^@with the axis of the solenoid ?

A closely wound solenoid of 2000 turns and area of cross-section 1.6 x

1.	A closely wound solenoid of 2000 turns and area of cross-section 1.6 xx 10^(-4) m^2, carrying a current of 4.0 A, 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 is the force and torque on the solenoid if a uniform horizontal magnetic field of 7.5 xx 10^(-21) T is set up at an angle of 30^@with the axis of the solenoid ?
Answer» `1.28Am^2,0.042Nm` `1.28Am^2 ,0.048 NM` `2.28 Am^2 ,0.038Nm` `1.28 Am^2 , 0.0038Nm` ANSWER :B

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