A solenoid has a coil C of 96 turns wound tightly about its centre, and the uniform magnetic flux in the solenoid is Φ = 6.8 × 10⁻⁶ × I where I is the solenoid current.

The d.c. supply in Fig. 7.1 is now replaced with a sinusoidal alternating supply.

Describe qualitatively the e.m.f. that is now induced in coil C.