A resistor is a small physics laboratory equipment device that you can use in electric circuits. It slows down the flow of electric current. It does this by providing resistance, which means it opposes the movement of electricity through it.

Resistors are used for several purposes:

They reduce the amount of current in a circuit.
They help control the voltage by dividing it between different parts of the circuit.
They help set the right conditions for other parts like transistors, which need a specific voltage to work properly.
In simple terms, a resistor acts like a speed breaker for electricity. It doesn’t stop the current completely but slows it down to a safe and useful level.