A closely wound solenoid of 2000 turns and area of cross- section 1.6 xx 0^(-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^(-2)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

1.	A closely wound solenoid of 2000 turns and area of cross- section 1.6 xx 0^(-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^(-2)T is set up at an angle of 30° with the axis of the solenoid ?
Answer» `1.28Am^(2), 0.042 NM` `1 .28Am^(2), 0.048 Nm` `2.28Am^(2), 0.038 Nm` `1.28Am^(2), 0.0038 Nm` ANSWER :B

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