A closely wound solenoid of 800 turns and area of cross section `2.5xx10^(-4)m^2` carries a current of 3A. What is its associated magnetic moment?

A closely wound solenoid of 1000 turns and area of cross section 2xx10^(-4)m^(2) carries a current of 2A. If is placed with its horizontal axis at 30^(@) with the direction of a uniform horizontal magnetic field of 0.16 T. What is the torque experienced by the solenoid?

A closely wound solenoid of 1000 turns and area of cross section 2xx10^(-4)m^(2) carries a current of 2A. If is placed with its horizontal axis at 30^(@) with the direction of a uniform horizontal magnetic field of 0.16 T. What is the amount of work done to rotate the solenoid from stable orientation to unstable orientation?

Copper has 8.0xx10^(28) conduction electrons per metre^3 . A copper wire of length 1m and cross sectional area 8.0xx10^(-6) m^2 carrying current and lying at right angle to a magnetic field of strength 5xx10^(-3) T experiences a force of 8.0xx10^(-2)N . Calculate the drift velocity of free electrons in the wire.

Estimate the average drilft velocity of conduction electrons in a copper wire of cross-section 20xx10^-3 cm^2 carrying a current of 20A. Assume the density of conduction electrons to be 9X10^28 m^3 .

Estimate the average drift speed of conduction electrons in a copper wire of cross-sectioal area 1.0xx10^(-7)m^2 carrying a current of 1.5 A. Assume that each copper atom contributes roughly one conduction electron. The density of copper is 9.0xx 10^3 kg//m^3 and its atomic mass is 63.5.

Estimate the average drift velocity of conduction electron of a copper wire of cross section 2.0 times 10^-3 cm^2 carrying a current of 2.0A.Assume the density of conduction electrons to be 9 times 10^28 m^-3 .

A 0.5 m long solenoid has 500 turns and has a flux density of 2.52xx10^(-3)T at its centre. Find the current in the solenoid.

A circular coil of closely wound N turns and radius r carries a current I . Write expressions for the following : the magnetic moment