Carbon Composition Resistor is a type of resistor which consist of a solid cylindrical resistive element with embedded wire leads or metal end caps to which the lead wires are attached.
Wire-woundResistor is often used in high power resistor applications or some other uses where its properties of low noise and power dissipation are needed.
Relay is an electro-magnetic devices that convert a magnetic flux generated by the application of a low voltage electrical control signal either AC or DC across the relay terminals, into a pulling mechanical force which operates the electrical contacts within the relay.
Integrated Circuit/IC, also called a chip, microchip or microelectronic circuit, is a semiconductor wafer on which thousands or millions of tiny resistors, capacitors, diodes and transistors are fabricated.