Tag: Semiconductors

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N-type and P-type semiconductors are types of extrinsic semiconductors. In an N-type semiconductor, current conduction is due to holes. Whereas ...

Potential barrier The potential difference created across the P-N junction due to the diffusion of electron and holes is called ...

Difference in concentration of charge carrier in the two sections of P-N junction. The electrons from N-region diffuse through the ...

Solid state device that converts artificial or natural light directly into electric current. Also called photovoltaic cell. It is based ...

It is diode which gives out light radiations when forward biased. Led’s are made of GaAsp, Gap. Light-emitting diode play ...

Valence band  The energy band formed by a series of energy levels containing valence electrons is known as valence band. ...

A device which increases the amplitude of the input signal is called amplifier. NPN transistor as CE amplifier ie =ib ...

Half wave rectifier  When the P-N junction diode rectifies half of the ac wave, it is called half wave rectifier. ...