A closely wound solenoid of 800 turns and area of cross section `2.5 xx 10^(-4) m^(2)` carries a current of 3.0 A. Explain of the sense in which the solenoid acts like a bar magnet. What is its associated magnetic moment ?

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^(-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 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. What is the magnetic moment associated with the solenoid ?

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. 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 80 cm long has 5 layers of windings of 400 turns each . If it carries a current of 8 A then magnetic field inside the solenoid near its centre is

A 100 turn closely wound circular coil of radius 10 cm carries a current a 3.2 A. What is the field at the centre of the coil ?