(a)[2]
The starter motor is turned on for 3.5 s. Calculate the charge that flows through the starter motor in this time.
(b)[2]
A relay is used to switch the starter motor circuit on and off, and it is governed by a second circuit. The driver uses a switch in that second circuit to operate the relay and control whether the starter motor is on or off. Explain how the current in the second circuit controls the relay.