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 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) , and carrying a current of 4.0 A, is suspended through its centre allowing it to turn in a horizontal plane. What is the the magnetic moment asociated with the solenoid ?

If the magnetic moment of a solenoid carrying current 2A and having area of crosssection 1.0 xx 10^(-4) m^(2) is 0.050 "Am"^(2) then calculate the number of turns in the solenoid.

A solenoid of inductance 2 H carries a current of 1 A. What is the magnetic energy stored in a solenoid ?

An air cored solenoid with length 30 cm , area of cross section 25 cm ^2 and number of turns 500 carries a current of 2.5 A. The current is suddenly switched off in a brief time of 10 ^(-3)s . What is the average back emf induced across the ends of the open switch in the circuit ?

A straight wire of mass 200 g and length 1.5 m carries a current of 2 A. It is suspended in mid-air by a uniform horizontal magnetic field B . What is the magnitude of the magnetic field?

What is the magnetic moment associated with a current loop of area 2 xx 10^(-3) m^2 and carrying current of 0.5A?

A solenoid of length 0.5 m has a radius of 1 cm and is made up of 500 turns. It carries a current of 5 A. What is the magnitude of the magnetic field inside the solenoid?