Discovery of semiconducting devices has revolutionised the field of electronics. Earlier, a…

Discovery of semiconducting devices has revolutionised the field of electronics. Earlier, a computer known as first generation computer, was as big as a room! The radio sets used to be so bulky that they could not be taken on a picnic. Semiconducting devices, being light and compact, have changed all that. Now, computers have become so small in size that they are called laptops and palm tops. Semiconducting devices, that are widely used in electronic gadgets like a television, a radio, an amplifier etc, are diodes, transistors, FETs, ICs, logic gates etc. Diodes are of different types like light emitting diodes, photodiodes, Zener diodes etc. They perform various functions like converting an ac voltage to dc voltage, emit light etc.