Mutual induction is utilized in which component?

Mutual induction is a principle that occurs when a change in current in one coil induces a voltage in another nearby coil. This principle is extensively utilized in the ignition coil. The ignition coil is designed to transform the low voltage from the battery into a high voltage necessary to ignite the fuel-air mixture in the engine's combustion chamber.

When current flows through the primary winding of the ignition coil, it creates a magnetic field that surrounds the coil. If this current is interrupted (as when the ignition switch is turned off), the collapsing magnetic field induces a high voltage in the secondary winding, which is significantly higher than the initial voltage. This high voltage then triggers the spark plugs, allowing the engine to start and run.

In contrast, the other components listed do not operate based on the principle of mutual induction. For instance, fuel injectors deliver a precise amount of fuel into the engine using pressurized fuel and electronic signals, while starter motors use direct current from the battery to turn the engine over. Batteries store electrical energy chemically and release it as needed; they do not rely on the principle of inductive coupling in their operation.