Electronics And Communication Engineering

A two branch parallel tuned circuit has a capacitance C in one of the two branches and resistance R in second branchs. As C is decreased the dynamic resistance

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Question: A two branch parallel tuned circuit has a capacitance C in one of the two branches and resistance R in second branchs. As C is decreased the dynamic resistance
[A].

increases

[B].

decreases

[C].

remains constant

[D].

may increases or decreases

Answer: Option A

Explanation:

Dynamic resistance = and increases as C is decreased.

A two branch tuned circuit has a coil of resistance R and inductance L in one branch and capacitance C in the second branch. If R is increased, the dynamic resistance

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Question: A two branch tuned circuit has a coil of resistance R and inductance L in one branch and capacitance C in the second branch. If R is increased, the dynamic resistance
[A].

decreases

[B].

increases

[C].

remains constant

[D].

may increases or decreases

Answer: Option B

Explanation:

Dynamic resistance = and increases as L is increased.

A transistor has two p-n junctions. The batteries should be connected such that

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Question: A transistor has two p-n junctions. The batteries should be connected such that
[A].

both junctions are forward biased

[B].

both junctions are reverse biased

[C].

one junction is forward biased and the other is reverse biased

[D].

either (a) or (b)

Answer: Option C

Explanation:

Emitter base junction is forward biased and base-collector junction is reverse biased.

In a series resonant circuit Q is more than 10. Then the lower half power frequency ω1, and resonant frequency ω0 are related as

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Question: In a series resonant circuit Q is more than 10. Then the lower half power frequency ω1, and resonant frequency ω0 are related as
[A].

ω1 = ω0 + bandwidth

[B].

ω1 = ω0 + 0.5 (bandwidth)

[C].

ω1 = ω0 – 0.5 (bandwidth)

[D].

ω1 = ω0 + bandwidth

Answer: Option C

Explanation:

No answer description available for this question.

A two branch parallel tuned circuit has a coil of resistance 100 Ω and inductance 0.005 H in one branch and 10 nF capacitor in the second branch. At resonance frequency is

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Question: A two branch parallel tuned circuit has a coil of resistance 100 Ω and inductance 0.005 H in one branch and 10 nF capacitor in the second branch. At resonance frequency is
[A].

100 rad/sec

[B].

10000 rad/sec

[C].

1000 rad/sec

[D].

more than 10000 rad/sec

Answer: Option C

Explanation:

= = 44.67 x 104 rad/sec.

A two branch parallel tuned circuit has a coil of resistance 100 Ω and inductance 0.005 H in one branch and 10 nF capacitor in the second branch. At resonance frequency, the dynamic resistance is

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Question: A two branch parallel tuned circuit has a coil of resistance 100 Ω and inductance 0.005 H in one branch and 10 nF capacitor in the second branch. At resonance frequency, the dynamic resistance is
[A].

1 Ω

[B].

10 Ω

[C].

100 Ω

[D].

more than 100 Ω

Answer: Option D

Explanation:

Dynamic resistance =

At midband frequencies the coupling capacitor in RC coupled CE amplifier may be considered as

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Question: At midband frequencies the coupling capacitor in RC coupled CE amplifier may be considered as
[A].

open circuit

[B].

short circuit

[C].

a reactance equal to load resistance

[D].

none of the above

Answer: Option B

Explanation:

No answer description available for this question.