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 […]
If a small amount of antimony is added to germanium crystal
Options
(a) it becomes a p-type semiconductor (b) the antimony becomes an acceptor atom (c) there will be more free electrons than […]
To obtain a p-type semiconductor, germanium must be doped with
Options
(a) Arsenic (b) Antimony (c) Indium (d) Phosphorus
Correct Answer:
Indium
Explanation:
P-type semiconductor is obtained when Si or Ge (tetravalent) is […]
In forward biasing of the p-n junction
Options
(a) the positive terminal of the battery connected to p-side and the depletion region becomes thick (b) the positive terminal of the battery is connected […]
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