V-I characteristics of LED is similar to forward bias characteristics of

A solar cell is p-n junction operating in

Barrier potential of Ga-As-P LED is

Which of the following is advantage of LED ?

Which of the following material is used to produce infrared LED's ?

The emitter of transistor is doped the heaviest because it

A transistor is preferable to a triode valve when used in amplifier be...

The current gain of a transistor is defined as

Transistors may not replace vacuum tubes in all uses because

In n-p-n transistor, the p-type crystal acts as

A transistor is used in the common emitter mode as an amplifier . Then

Which of the following element is used in making transistors ?

In transistor symbols, the arrows shows the direction of-

In an n-p-n transistor, the emitter current is always less than the em...

In case of an n-p-n transistor, the collector current is always less t...

In a transistor circuit, the emitter current is 50 mA and base current...

In p-n-p transistor , the p type crystal acts as

npn transistors are preferred to pnp transistors because they have

How is the emitter base junction in the transistor biasing ?

In a transistor with normal bias, the emitter base junction