question_answer

A long solenoid has magnetic field induction 10 T at its centre. A 100 turn close-packed coil of area 1 \[c{{m}^{2}}\] is placed at the centre of the solenoid. This coil is arranged so that at the centre of the solenoid is parallel to its axis. The current in the solenoid is reduced to zero and then raised to its initial value in other direction at a steady rate over a period of\[0\cdot 05\text{ }s\]. What induced emf appears in the coil while the current is being changed, in volt.

Answer:

4.00