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 […]
C and Si both have same lattice strcture, having 4 bonding electron in each. However, C is insulator whereas Si is intrinsic semiconductor. This is because:
Options
(a) In case of V the […]
In the half wave rectifier circuit operating from 50 Hz mains frequency, the fundamental frequency in the ripple would be
Options
(a) 25 Hz (b) 50 Hz (c) 70.7 Hz (d) 100 Hz
Correct […]
In communication with help of antenna if height is doubled then the range covered which was initially r would become
Options
(a) √2r (b) 3r (c) 4r (d) 5r
Correct Answer:
√2r
Explanation:
Range […]
Pure Si at 500 K has equal number of electron (nₑ) and hole (nₕ) concentrations of 1.5 x 10¹⁶ m⁻³. Doping by indium increases nₕ to 4.5 x 10²² m⁻³. The doped semiconductor is of […]
If the highest modulating frequency of the wave is 5 kHz, the number of stations that can be accomodated in a 150 kHz bandwidth?
Options
(a) 15 (b) 10 (c) 5 (d) None of […]
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