Which devices supply electric current in a car?

Question

Which of these devices are sources of electric current in a car?

Answer choices

1. Battery.
2. Starter motor.
3. Alternator.
4. Lights.
5. Horn.
6. Battery and alternator.
7. Battery, starter motor, and alternator.
8. Starter motor, alternator, and horn.
9. Battery, starter motor, lights, and horn.

Explanation

The battery supplies stored energy to the electrical circuit. The alternator converts mechanical energy from the running engine into electricity, supplying equipment and charging the battery.

The starter motor, lights, and horn consume electrical energy. The complete set of sources appears in option 6: battery and alternator.