Transistors

21. The value of a of a transistor is ___________

more than 1
less than 1
1
none of the above

Detailed SolutionThe value of a of a transistor is ___________

22. For germanium transistor amplifier, VCE should ___________ for faithful amplification

Be zero
Be 0.2 V
Not fall below 0.7 V
None of the above

Detailed SolutionFor germanium transistor amplifier, VCE should ___________ for faithful amplification

23. At series resonance, the phase angle between applied voltage and circuit is ___________

90°
180°
0°
None of the above

Detailed SolutionAt series resonance, the phase angle between applied voltage and circuit is ___________

24. The Q of an LC circuit is given by ___________

2pfr x R
R / 2pfrL
2pfrL / R
R2/2pfrL

Detailed SolutionThe Q of an LC circuit is given by ___________

25. A resonant circuit contains ___________ elements

R and L only
R and C only
Only R
L and C

Detailed SolutionA resonant circuit contains ___________ elements

26. The stabilisation of operating point in potential divider method is provided by ___________

RE consideration
RC consideration
VCC consideration
None of the above

Detailed SolutionThe stabilisation of operating point in potential divider method is provided by ___________

27. Double tuned circuits are used in ___________ stages of a radio receiver

IF
Audio
Output
None of the above

Detailed SolutionDouble tuned circuits are used in ___________ stages of a radio receiver

28. The Q of a tuned circuit refers to the property of ___________

Sensitivity
Fidelity
Selectivity
None of the above

Detailed SolutionThe Q of a tuned circuit refers to the property of ___________

29. In a base resistor method, if the value of ß changes by 50, then collector current will change by a factor

25
50
100
200

Detailed SolutionIn a base resistor method, if the value of ß changes by 50, then collector current will change by a factor

30. The zero signal IC is generally ___________ mA in the initial stages of a transistor amplifier

4
1
3
More than 10

Detailed SolutionThe zero signal IC is generally ___________ mA in the initial stages of a transistor amplifier

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