A long slenoid of radius 2 cm has 100 turns/cm and carries a current of 5A. A coil of radus 1 cm having 100 turns and a total resistance of 20 Omega is placed inside the solenoid coxially. The coil is conneted to a galvanometer. If the current in the solenoid is reversed in direction, find the charge flown through the galvanometer.

A long solenoid of radius 2 cm has 100 turns/cm and is surrounded by a 100- turn coil of radius 4cm having a total resistance of 20 Omega . The coil is connected to a galvanometer as shown in fig. If the current in the solenoid is changed form 5 A in one direction to 5 A in the opposite direction, find the charge which flows through the galvanometer.

A long solenoid of radius 2 cm has 100 turns/cm and is surrounded by a 100- turn coil of radius 4cm having a total resistance of 20 Omega . The coil is connected to a galvanometer as shown in fig. If the current in the solenoid is changed form 5 A in one direction to 5 A in the opposite direction, find the charge which flows through the galvanometer.

A circular coil of radius 10 cm having 100 turns carries a current of 3.2 A. The magnetic field at the center of the coil is

A circular coil of radius 10 cm having 100 turns carries a current of 3.2 A. The magnetic field at the center of the coil is

A long solenoid of 50 cm length having 100 turns carries a current of 2.5A. The magnetic field at centre of solenoid is:

A long solenoid of 50 cm length having 100 turns carries a current of 2.5A. The magnetic field at centre of solenoid is:

A circular coil of radius 10 cm and 100 turns carries a current 1 A. What is the magnetic moment of the coil ?

A long solenoid having 400 turns per cm carries a current 2A. A 100 turn coil of cross-sectional area 4 cm2 is placed co-axially inside the solenoid so that the coil is in the field produced by the solenoid. Find the emf induced in the coil if the current through the solenoid reverse its direction in 0.04 sec.