Why do cars need a battery

The video explains how a car battery starts the engine by powering the starter motor, which engages the flywheel to initiate the combustion engine. It discusses the alternator's role in recharging the battery and providing power to the car's electrical systems. The video also covers the structure and function of lead acid batteries, highlighting their chemical energy storage and recharging capabilities.

What component is responsible for engaging the flywheel to start the engine?

• Alternator

• Starter motor

• Battery

• Crankshaft

What happens when the alternator cannot meet the car's electrical demand?

• The alternator increases its output

• The car's electrical systems shut down

• The engine stops running

• The battery provides additional power

What is the primary function of the alternator in a car?

• To recharge the battery and power electrical systems

• To start the engine

• To provide mechanical power to the wheels

• To store chemical energy

What type of chemical reaction occurs in a lead acid battery to release energy?

• Combustion reaction

• Electrochemical reaction

• Photosynthesis

• Nuclear reaction

How does a lead acid battery store energy?

• As mechanical energy

• As thermal energy

• As chemical energy

• As electrical energy