(a)[3]
On Fig. 10.1, add field lines to show the magnetic field within the solenoid.
(b)[2]
State Faraday's law for electromagnetic induction.
(c)[3]
A coil of insulated wire is wound onto a soft-iron core. The coil is connected in series with a battery, a switch and an ammeter, as shown in Fig. 10.2. Use laws of electromagnetic induction to explain why the current rises gradually to its maximum value when the switch is closed.