How does a key turn on a car engine?

When you turn the key in your car’s ignition, you are completing a circuit that allows electricity to flow from the battery to the starter motor. The starter motor then turns the engine over, which starts the combustion process and gets your car running.

Here is a more detailed explanation of the process:

When you turn the key, you are completing a circuit that allows electricity to flow from the battery to the ignition switch.
The ignition switch then sends electricity to the starter solenoid.
The starter solenoid engages the starter motor, which turns the engine over.
Once the engine is running, the starter motor disengages and the ignition switch turns off.

The battery

The battery is the source of electricity for your car’s electrical system. It provides the power to start the engine, run the lights, and operate the other electrical components in your car.

The ignition switch

The ignition switch is a switch that controls the flow of electricity from the battery to the starter motor. When you turn the key, you are completing a circuit that allows electricity to flow from the battery to the starter motor.

The starter solenoid

The starter solenoid is a device that engages the starter motor. When the ignition switch sends electricity to the starter solenoid, the solenoid engages the starter motor and turns the engine over.

The starter motor

The starter motor is a powerful electric motor that turns the engine over. When the starter solenoid engages the starter motor, the starter motor turns the engine over until it starts.