Question

what is a resistor and why it is used

Answer 1

a device having resistance to the passage of an electric current.

A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses.

Answer 2

●A component in an electric circuit which offers resistance to the flow of electrons constituting electric current is known as resistor.
● Resistors are used to make those electrical devices, where high resistance is required.
● Resistors also reduce current in a circuit.