Electronics and Communication Engineering - Electronic Devices and Circuits

21.
Holes act like
positive charges
neutral atoms
negative charges
crystals
Answer: Option
Explanation:
No answer description is available. Let's discuss.

22.

Assertion (A): Silicon is less sensitive to changes in temperature than germanium.

Reason (R): It is more difficult to produce minority carriers in silicon than in germanium.

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.

23.
The number of protons in a silicon atom is
32
28
14
4
Answer: Option
Explanation:
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24.
The emitter follower is widely used in electronic instrument because
its voltage gain is less than unity
its voltage gain is very high
its O/P Impedance is low and input impedance is high
its O/P Impedance is high and I/P impedance is low
Answer: Option
Explanation:
No answer description is available. Let's discuss.

25.
A cascade amplifier stage is equivalent to
a common emitter stage followed by a common stage
a common base stage followed by an emitter follower
an emitter follower stage followed by a common base stage
a common base stage followed by a common emitter stage
Answer: Option
Explanation:
No answer description is available. Let's discuss.