transistor tuned amplifiers MCQs – Page 2

Practise focused transistor tuned amplifiers questions with marked answers for exam preparation and subject revision.

transistor tuned amplifiers Mcqs

21. If L/C ratio of a parallel LC circuit is increased, the Q of the circuit______________?
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A. None of the above

B. Is decreased

C. Is increased

D. Remains the same

22. At parallel resonance, the net reactive component circuit current is _______________?
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A. Capacitive

B. Zero

C. Inductive

D. None of the above

23. In the above question, what are the values of cut-off frequencies?
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A. 1020 kHz , 980 kHz

B. 1030 kHz , 970 kHz

C. None of the above

D. 140 kHz , 60 kHz

24. A resonant circuit contains ____________elements?
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A. R and L only

B. L and C

C. R and C only

D. Only R

25. A tuned amplifier is used in ___________ applications?
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A. None of the above

B. Low frequency

C. Radio frequency

D. Audio frequency

26. The Q of a tuned amplifier is generally _________________?
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A. Less than 10

B. Less than 5

C. None of the above

D. More than 10

27. At series resonance, the circuit offers____________ impedance?
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A. None of the above

B. Maximum

C. Zero

D. Minimum

28. In parallel resonance, the circuit impedance is_________________?
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A. CR/L

B. C/LR

C. R/LC

D. L/CR

29. In a parallel LC circuit, if the signal frequency is decreased below the resonant frequency, then________________?
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A. None of the above

B. Line current becomes minimum

C. XL increases and XC decreases

D. XL decreases and XC increases

30. A tuned amplifier uses__________load?
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A. Resistive

B. LC tank

C. Inductive

D. Capacitive

31. The voltage gain of a tuned amplifier is____________at resonant frequency
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A. Maximum

B. Half-way between maximum and minimum

C. Minimum

D. Zero

32. Tuned class C amplifiers are used for RF signals of________________?
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A. None of the above

B. Low power

C. Very high power

D. High power

33. At series or parallel resonance, the circuit power factor is ________________?
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A. 0

B. 1

C. 8

D. 5

34. The dimensions of L/CR are that of _______________?
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A. Farad

B. Henry

C. None of the above

D. Ohm

35. At series resonance, the net reactive component of circuit current is _______________?
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A. Capacitive

B. None of the above

C. Zero

D. Inductive

36. For frequencies below resonant frequency, a series LC circuit behaves as a _____________ load?
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A. Resistive

B. Inductive

C. None of the above

D. Capacitive

37. For frequencies below the resonant frequency , a parallel LC circuit behaves as a ______________load?
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A. Resistive

B. None of the above

C. Capacitive

D. Inductive

38. At parallel resonance, the line current is_______________?
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A. Quite large

B. Minimum

C. Maximum

D. None of the above

39. If Q of an LC circuit increases, then bandwidth ______________?
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A. Decreases

B. Remains the same

C. Insufficient data

D. Increases

40. At series resonance, the phase angle between applied voltage and circuit is______________?
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A. 90o

B. 180o

C. 0o

D. None of the above

Showing 21 to 40 of 40 mcqs