Question

explain about resistor

Answer 1

Resistor is a device that does not allow electric current to flow through it freely in a circuit.

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

Resistor is a conductor which is used to control current.
Resistors have fixed resistance but rheostat or variable resistors are the type of resistors whose resistance can be controlled according to requirement.