Transistors

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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