Electronics And Communication Engineering | Networks Analysis And Synthesis

In a series L-C circuit fed by ac voltage, voltage drops across L and C are 40 V and 30 V respectively. The supply voltage is

Byadmin July 31, 2022

Question: In a series L-C circuit fed by ac voltage, voltage drops across L and C are 40 V and 30 V respectively. The supply voltage is
[A].

70 V

[B].

10 V

[C].

50 V

[D].

1.333 V

Answer: Option C

Explanation:

|V| = IXL – IXC.

Electronics And Communication Engineering | Networks Analysis And Synthesis

In figure the switch has been in position 1 for a long time. At t = 0, the switch is moved to position 2. The equation for transient current is

Question: In figure the switch has been in position 1 for a long time. At t = 0, the switch is moved to position 2. The equation for transient current is
[A].

[B].

[C].

[D].

Answer: Option C

Explanation:

When switch is in position 2, time constant is

Read More In figure the switch has been in position 1 for a long time. At t = 0, the switch is moved to position 2. The equation for transient current is
Analog Electronics | Electronics And Communication Engineering

A full wave rectifier using centre tapped transformer and a bridge rectifier use similar diodes and have equal no load output voltage. Under equal load conditions

Question: A full wave rectifier using centre tapped transformer and a bridge rectifier use similar diodes and have equal no load output voltage. Under equal load conditions
[A].

Output voltage of bridge rectifier
[B].
Output voltage of bridge rectifier will be more than that of other
[C].
Output voltage of both will be exactly equal
[D].
Output voltage of any one may be more than that of other

Answer: Option A

Explanation:

Since two diodes are in series bridge rectifier, voltage drop is more.

Read More A full wave rectifier using centre tapped transformer and a bridge rectifier use similar diodes and have equal no load output voltage. Under equal load conditions
Electronics And Communication Engineering | Networks Analysis And Synthesis

A variable resistance R and capacitive reactance XC are fed by an voltage. The current locus is

Question: A variable resistance R and capacitive reactance XC are fed by an voltage. The current locus is
[A].

a semi circle in 4th quadrant
[B].
a semi circle in first quadrant
[C].
a straight line in 4th quadrant
[D].
a straight line first quadrant

Answer: Option B

Explanation:

No answer description available for this question.

Read More A variable resistance R and capacitive reactance XC are fed by an voltage. The current locus is
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 series resonant circuit has inductance L. If L is increased, the resonant frequency

Question: A series resonant circuit has inductance L. If L is increased, the resonant frequency
[A].

increases
[B].
decreases
[C].
remains constant
[D].
may increases or decreases

Answer: Option B

Explanation:

. As L increases ωr decreases.

Read More A series resonant circuit has inductance L. If L is increased, the resonant frequency
Analog Electronics | Electronics And Communication Engineering

A Colpitt’s oscillator uses

Question: A Colpitt’s oscillator uses?

[A]. a tapped inductor[B]. an inductor and two capacitors

[C].both (a) and (b)

[D]. either (a) or (b)

Answer: Option C

Explanation:

No answer description available for this question.

Read More A Colpitt’s oscillator uses

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