A charge Q is enclosed by a Gaussian spherical surface of radius R. If the radius is doubled, then the outward electric flux will
Options
(a) increase four times (b) be reduced to […]
The number of NAND gates required to form an AND gate is
Options
(a) 1 (b) 2 (c) 3 (d) 4
Correct Answer:
2
Explanation:
No explanation available. Be the first to write […]
The voltage gain of an amplifier with 9% negative feedback is 10. The voltage gain without feedback will be
Options
(a) 1.25 (b) 100 (c) 90 (d) 10
Correct Answer:
100
Explanation:
One […]
One way in which the operation of a n-p-n transistor differs from that of a p-n-p
Options
(a) the emitter junction is reserved biased in n-p-n (b) the emitter junction injects minority carriers […]
In an unbiased p-n junction, holes diffuse from the p-region to n-region because of
Options
(a) the potential difference across the p-n junction (b) the attraction of free electrons of n-region (c) the […]
Carbon,silicon and germanium have four valence electrons each. At room temperature which one of the following statements is most appropriate?
Options
(a) The number of free electrons for conduction is significant only in […]
In a common emitter (CE) amplifier having a voltage gain G, the transistor used has transconductance 0.03 mho and current gain 25. If the above transistor is replaced with another one with transconductance 0.02 mho […]
In a n-type semiconductor, which of the following statement is true?
Options
(a) Electrons and minority carriers and pentavalent atoms are dopants (b) Holes and minotiry carriers and pentavalent atoms are dopants (c) […]
The input resistance of a silicon transistor is 100 W. Base current is changed by 40 µA which results in a change in collector current by 2mA. This transistor is used as a common emitter […]
The numebr 0 (zero) is required for
Options
(a) Transistor (b) Abacus (c) Computer (d) Calculator
Correct Answer:
Computer
Explanation:
No explanation available. Be the first to write the explanation for this question […]
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