In common base mode of a transistor, the collector current is 5.488 mA for an emitter current of 5.60 mA. The value of the base current amplification factor (β) will be
Options
(a) […]
The voltage gain of an amplifier with 9% negative feedback is 10. The voltage gain without feedback will be
Options
(a) 90 (b) 10 (c) 1.25 (d) 100
Correct Answer:
100
Explanation:
Negative […]
The output of an AND gate is connected to both the inputs of a NOR gate, then this circuit will acts as a
Options
(a) NOR gate (b) AND gate (c) NOT gate […]
For a cubic crystal structure which one of the following relations indicating the cell characteristics is correct?
Options
(a) a ≠ b ≠ c and α = β = γ = 90⁰ (b) […]
The depletion layer in the p-n junction region is caused by
Options
(a) drift of holes (b) drift of electrons (c) diffusion of carriers (d) migration of impurity ions
Correct Answer:
diffusion of carriers
What is the value of Ā+A in the Boolean algebra?
Options
(a) A (b) 0 (c) 1 (d) Ā
Correct Answer:
1
Explanation:
Ā + A should always be equal to 1. As addition […]
When a p-n junction is reverse biased, then the current through the junction is mainly due to
Options
(a) Only diffusion of charges (b) Only drift of charges (c) Both drift and diffusion of […]
If the feedback voltage is increased in a negative feedback amplifier, then
Options
(a) both gain and distortion decrease (b) the distortion increase (c) the gain decrease and distortion increase (d) the gain […]
In p- type semiconductor, the acceptor level lies
Options
(a) near the conduction band (b) halfway between conduction and valence band (c) within conduction band (d) near the valence band
Correct Answer:
near […]
Which one of the following statements is not correct in case of a semiconductor?
Options
(a) Temperature coefficient of resistance is negative (b) Doping increases conductivity (c) At absolute zero temperature, it behaves […]
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