A current i=1.5A is flowing through a long solenoid of diameter 3.2cm ’ having 220 turns per cm. At its centre; a 130 turn closely packed coil of diameter 2.1cm is placed such that the coil is coaxial with the long solenoid. The current in the solenoid is reduced to zero and then increases again to 1.5A in reverse direction in 25ms. What is the magnitude of emf induced in the coil while the current in the coil is changing??

A current i=1.5A is flowing through a long solenoid of diameter 3.2cm

1.	A current i=1.5A is flowing through a long solenoid of diameter 3.2cm ’ having 220 turns per cm. At its centre; a 130 turn closely packed coil of diameter 2.1cm is placed such that the coil is coaxial with the long solenoid. The current in the solenoid is reduced to zero and then increases again to 1.5A in reverse direction in 25ms. What is the magnitude of emf induced in the coil while the current in the coil is changing??
Answer» A current i=1.5A is flowing through a long solenoid of diameter 3.2cm ’ having 220 turns per cm. At its centre; a 130 turn closely packed coil of diameter 2.1cm is placed such that the coil is coaxial with the long solenoid. The current in the solenoid is reduced to zero and then increases again to 1.5A in reverse direction in 25ms. What is the magnitude of emf induced in the coil while the current in the coil is changing??