A solenoid has `2000` turns wound over a length of `0.3 m`. Its cross-sectional area is equal to `1.2 xx 10^(-3) m^(2)`. Around its central cross-section a coil of `300` turns in wound. If an initial current of `2 A` flowing in the solenoid is reversed in `0.25 s`, the emf induced in the coil is

A solenoid of 1000 turns is wound over a length of 40 cm. The area of cross section is 20 cm^(2) . Around its central section, a coil of 500 turns is closely wound. If an initial current of 1 A in the solenoid is reversed in 0.3 s, find the emf induced in the coil.

A solenoid of 2000 turns is wound over a length of 0.3 m. The area aof cross section is 1.3 xx 10^(-3) m^(2) . Around its central seciton, a coil of 300 turns is closely wound. If an initial current of 2 A is reversed in 0.25 s, find the e.m.f induced in the coil .

A solenoid has 2000 turns would over a length of 0.30 m. The area of its cross-section is 1.2xx10^(-2)m^(2) . If an initial current of 2 A in the solenoid is reversed in 0.25 s, then the emf induced in the coil is

An air core solenoid has 1000 turns and is one metre long. Its cross-sectional area is 10cm^(2) . Its self-inductance is

A long solenoid having 200 turns per centimeter carries a current of 1.5 A . At the center of the solenoid is placed a coil of 100 turns of cross-sectional area 3.14 xx 10^(-4) m^(2) having its axis parallel to the field produced by the solenoid. When the direction of current in teh solenoid is reversed within 0.05 s , the induced emf in the coil is

An ideal solenoid of cross-sectional area 10^(-4)m^(2) has 500 turns per metre. At the centre of this solenoid, another coil of 100 turns is wrapped closely around it. If the current in the coil changes from 0 to 2 A in 3.14 ms, the emf developed in the second coil is

An air cored solenoid is of length 0.3 m, area of cross section 1.2 xx 10^(-3) m^(2) and has 2500 turns. Around the solenoid and the coil are electrically insulated from each other. Calculate the e.m.f. induced in the coil if the initial current of 3 A in the solenoid is reversed in 0.25 s.

A solenoid is of length 50 cm and has a radius of 2cm . It has 500 turns. Around its central section a coil of 50 turns is wound. Calculate the mutual inductance of the system.

A closlly wound coil of 1000 turns and cross sectional area 2xx10^(-4) m^(2) carries a current of 1.0 A.The magnetic moment of the coil is

Find the self-inductance of a toroidal solenoid of radius 20 cm, area of cross section 100 cm^(2) and having 500 turns. Assume that the field variations across the cross section of the toroid are negligible. Further, if a secondary coil of 300 turns is wound on this toroid and the current in the primary coil is increased from 2 A to 5 A in 0.05 s. Find the emf induced in the secondary coil.