A cross-section through a current-carrying solenoid is shown in Fig. 10.1. On Fig. 10.1, draw field lines to represent the magnetic field inside the solenoid. [Figure 10.1]

1. (a)A cross-section through a current-carrying solenoid is shown in Fig. 10.1. On Fig. 10.1, draw field lines to represent the magnetic field inside the solenoid. [Figure 10.1][3]
2. (b)State Faraday's law of electromagnetic induction.[2]
3. (c)A coil of insulated wire is wound on to 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, when the switch is closed, the current increases gradually to its maximum value. [Figure 10.2][3]

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