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Electronics and Communication Engineering - Electromagnetic Field Theory

Exercise : Electromagnetic Field Theory - Section 14
31.
The electron and hole concentration in a intrinsic semiconductor are ni and Pi respectively when doped with a P type material, these change to n and P, respectively. Then
n + P = ni + Pi
n + ni = P + Pi
nPi = niP
nP = ni Pi
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
The energy to cause thermionic emission is supplied by heating the cathode.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.

Assertion (A): In an n-p-n transistor as the electrons enter the collector region, they are accelerated towards the collector terminal.

Reason (R): Emitter base junction in BJT is forward biased.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
A is false but R is true
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.

Assertion (A): In reverse biased p-n junction, the reverse saturation current is nearly constant if the reverse voltage is less than critical value.

Reason (R): The total reverse current is sum of reverse saturation current and surface leakage current.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
A is false but R is true
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
The mass of an electron is nearly
9.1 x 10-27 kg
9.1 x 10-29 kg
9.1 x 10-31 kg
9.1 x 10-35 kg
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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