Home
Class 12
PHYSICS
In a transistor the base is made very th...

In a transistor the base is made very thin and is lightly doped with an impurity, because.

A

to save the transistor form heating effect

B

to enable the emitter to emit small number of electrons and holes

C

to enable the collector to collect 95% of the holes or electron coming from the emitter side

D

none of the above

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Similar Questions

Explore conceptually related problems

A semiconductor is doped with a donor impurity

Assertion : In a transistor the base is made thin. Reason: A thin base makes the transistor stable.

Assertion : In a transistor the base is made thin. Reason: A thin base makes the transistor stable.

If we use very thin and long wire, then

(a) Differentiate between three segments of a transistor on the basis of their size and level of doping. (b) How is a transistor biased to be in active state? (c) With the help of a necessary circuit diagram, describe briefly how n-p-n transistor in CE configuration amplifies a small sinusoidal input voltage. Write the expression for the ac current gain.

In a transistor, doping level in base is increased slightly. How will it affect (i) collector current and (ii)base current?

The emitter of transistor is doped the heaviest because it

Silicon doped with electron-rich impurity forms

In a transistor, the emitter , base and collector are respectively

In a transistor, the collector current is always · less then the emitter current because -