Networks Analysis and Synthesis

Electronics And Communication Engineering | Networks Analysis And Synthesis

A series resonant circuit has R = 10 Ω, L = 1 μH and C = 1 mF. If R is increased to 20 Ω the resonant frequency

Question: A series resonant circuit has R = 10 Ω, L = 1 μH and C = 1 mF. If R is increased to 20 Ω the resonant frequency
[A].
increases
[B].
decreases
[C].
remains constant
[D].
may increases or decreases

Answer: Option C

Explanation:

fr depends only on L and C.

Read More A series resonant circuit has R = 10 &ohm;, L = 1 μH and C = 1 mF. If R is increased to 20 &ohm; the resonant frequency
Electronics And Communication Engineering | Networks Analysis And Synthesis

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

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.

Read More 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
Electronics And Communication Engineering | Networks Analysis And Synthesis

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

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.

Read More 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
Electronics And Communication Engineering | Networks Analysis And Synthesis

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

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.

Read More In a series resonant circuit Q is more than 10. Then the lower half power frequency ω1, and resonant frequency ω0 are related as
Electronics And Communication Engineering | Networks Analysis And Synthesis

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

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.

Read More A two branch parallel tuned circuit has a coil of resistance 100 &ohm; and inductance 0.005 H in one branch and 10 nF capacitor in the second branch. At resonance frequency is
Electronics And Communication Engineering | Networks Analysis And Synthesis

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

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 &ohm;
[B].
10 &ohm;
[C].
100 &ohm;
[D].
more than 100 &ohm;

Answer: Option D

Explanation:

Dynamic resistance =

Read More A two branch parallel tuned circuit has a coil of resistance 100 &ohm; and inductance 0.005 H in one branch and 10 nF capacitor in the second branch. At resonance frequency, the dynamic resistance is
Electronics And Communication Engineering | Networks Analysis And Synthesis

A two branch parallel tuned circuit has 100 Ω resistance and 0.1 H inductance in one branch and 10-6 F capacitor in the other. At resonance frequency, the dynamic resistance is

Question: A two branch parallel tuned circuit has 100 Ω resistance and 0.1 H inductance in one branch and 10-6 F capacitor in the other. At resonance frequency, the dynamic resistance is
[A].
10 &ohm;
[B].
100 &ohm;
[C].
1000 &ohm;
[D].
10000 &ohm;

Answer: Option C

Explanation:

Dynamic resistance =

Read More A two branch parallel tuned circuit has 100 &ohm; resistance and 0.1 H inductance in one branch and 10-6 F capacitor in the other. At resonance frequency, the dynamic resistance is
Electronics And Communication Engineering | Networks Analysis And Synthesis

In figure, the magnitude of V

Question: In figure, the magnitude of V
[A].
must be more than that of Va
[B].
must be more than that of Vb
[C].
must be more than that of Va or Vb
[D].
can be equal to or less than or more than that of Va or Vb

Answer: Option D

Explanation:

V depends on magnitudes and phase angles of Va and Vb.

Read More In figure, the magnitude of V
Electronics And Communication Engineering | Networks Analysis And Synthesis

In figure, the current I4 is

Question: In figure, the current I4 is
[A].
10 ∠0
[B].
5 ∠90°
[C].
5 ∠270°
[D].
10 ∠90°

Answer: Option B

Explanation:

I4 = I1 + I2 + I3

or I4 = 5∠90° + 5∠0 + 5∠180° = 5∠90°.

Read More In figure, the current I4 is
Electronics And Communication Engineering | Networks Analysis And Synthesis

In a series ac circuit a voltage of 20 V at 25 Hz causes a current of 0.20 A, while the same voltage at 75 Hz causes a current of 0.12 A. The circuit consists of

Question: In a series ac circuit a voltage of 20 V at 25 Hz causes a current of 0.20 A, while the same voltage at 75 Hz causes a current of 0.12 A. The circuit consists of
[A].
R and C in parallel
[B].
R and C in series
[C].
R and L in series
[D].
either (a) or (b)

Answer: Option B

Explanation:

As f increases impedance increases and current decreases in RL circuit.

Read More In a series ac circuit a voltage of 20 V at 25 Hz causes a current of 0.20 A, while the same voltage at 75 Hz causes a current of 0.12 A. The circuit consists of