Transistors Archives - Page 4 of 10 - MCQ and Quiz for Exams

31. If a high degree of selectivity is desired, then double-tuned circuit should have ___________ coupling

Loose

Tight

Critical

None of the above

Detailed SolutionIf a high degree of selectivity is desired, then double-tuned circuit should have ___________ coupling

32. At parallel resonance, the ratio $$\frac{{\text{L}}}{{\text{C}}}$$ is ___________

Very large

Zero

Small

None of the above

Detailed SolutionAt parallel resonance, the ratio $$\frac{{\text{L}}}{{\text{C}}}$$ is ___________

33. In the double tuned circuit, if the mutual inductance between the two tuned circuits is decreased, the level of resonance curve ___________

Remains the same

Is lowered

Is raised

None of the above

Detailed SolutionIn the double tuned circuit, if the mutual inductance between the two tuned circuits is decreased, the level of resonance curve ___________

34. Transistor biasing is done to keep ___________ in the circuit

Proper direct current

Proper alternating current

The base current small

Collector current small

Detailed SolutionTransistor biasing is done to keep ___________ in the circuit

35. In series resonance, there is ___________

Voltage amplification

Current amplification

Both voltage and current amplification

None of the above

Detailed SolutionIn series resonance, there is ___________

36. Thermal runaway occurs when ___________

Collector is reverse biased

Transistor is not biased

Emitter is forward biased

Junction capacitance is high

Detailed SolutionThermal runaway occurs when ___________

37. In a pnp transistor, the current carriers are ___________

acceptor ions

donor ions

free electrons

holes

Detailed SolutionIn a pnp transistor, the current carriers are ___________

38. Transistor biasing represents ___________ conditions

a.c.

d.c.

both a.c. and d.c.

none of the above

Detailed SolutionTransistor biasing represents ___________ conditions

39. At parallel resonance, the net reactive component circuit current is ___________

Capacitive

Zero

Inductive

None of the above

Detailed SolutionAt parallel resonance, the net reactive component circuit current is ___________

40. The circuit that provides the best stabilization of operating point is ___________

Base resistor bias

Collector feedback bias

Potential divider bias

None of the above

Detailed SolutionThe circuit that provides the best stabilization of operating point is ___________

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