Our website is made possible by displaying online advertisements to our visitors. Please consider supporting us by whitelisting our website.

Electronics And Communication Engineering

A coil of resistance R and inductance L is connected in series with 5 μF capacitor. The source frequency is equal to resonance frequency and circuit current is 0.5 A. Another 5 F capacitor is connected in parallel with the above capacitor. The circuit current will be

Electronics And Communication Engineering, Networks Analysis And Synthesis /
Question: A coil of resistance R and inductance L is connected in series with 5 μF capacitor. The source frequency is equal to resonance frequency and circuit current is 0.5 A. Another 5 F capacitor is connected in parallel with the above capacitor. The circuit current will be
[A].

0.5 A

[B].

more than 0.5 A

[C].

less than 0.5 A

[D].

0.5 A or less

Answer: Option C

Explanation:

Since C increases, the circuit will not be in resonance. Therefore, current decreases (In series resonant circuit current is maximum at resonance).

A coil of resistance R and inductance L is connected in series with 5 μF capacitor. The source frequency is equal to resonance frequency and circuit current is 0.5 A. Another 5 F capacitor is connected in parallel with the above capacitor. The circuit current will be Read More »

Electronics And Communication Engineering, Networks Analysis And Synthesis

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

Analog Electronics, Electronics And Communication Engineering /
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.

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 Read More »

Analog Electronics, Electronics And Communication Engineering

A coil of resistance R and inductance L is connected in series with 10 mF capacitor. The resonant frequency is 1000 Hz. Another 10 F capacitor is connected in parallel with the above capacitor. The new resonance frequency will be

Electronics And Communication Engineering, Networks Analysis And Synthesis /
Question: A coil of resistance R and inductance L is connected in series with 10 mF capacitor. The resonant frequency is 1000 Hz. Another 10 F capacitor is connected in parallel with the above capacitor. The new resonance frequency will be
[A].

1000 Hz

[B].

more than 1000 Hz

[C].

less than 1000 Hz

[D].

may be more or less than 10000 Hz

Answer: Option C

Explanation:

Total capacitance increases and therefore ωr decreases.

A coil of resistance R and inductance L is connected in series with 10 mF capacitor. The resonant frequency is 1000 Hz. Another 10 F capacitor is connected in parallel with the above capacitor. The new resonance frequency will be Read More »

Electronics And Communication Engineering, Networks Analysis And Synthesis

A series resonant circuit has inductance L. If L is increased, the resonant frequency

Electronics And Communication Engineering, Networks Analysis And Synthesis /
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.

A series resonant circuit has inductance L. If L is increased, the resonant frequency Read More »

Electronics And Communication Engineering, Networks Analysis And Synthesis

As compared to full wave rectifier, a half wave rectifier

Analog Electronics, Electronics And Communication Engineering /
Question: As compared to full wave rectifier, a half wave rectifier
[A].

has higher ripple factor

[B].

has lower ripple factor

[C].

may have higher or lower ripple factor

[D].

has same ripple factor

Answer: Option A

Explanation:

No answer description available for this question.

As compared to full wave rectifier, a half wave rectifier Read More »

Analog Electronics, Electronics And Communication Engineering

Four inputs A, B, C, D are fed to a NOR gate. The output of NOR gate is fed to an inverter. The output of inverter is

Digital Electronics, Electronics And Communication Engineering /
Question: Four inputs A, B, C, D are fed to a NOR gate. The output of NOR gate is fed to an inverter. The output of inverter is
[A].

A + B + C + D

[B].

A + B + C + D

[C].

ABCD

[D].

ABCD

Answer: Option A

Explanation:

Output = = A + B + C + D.

Four inputs A, B, C, D are fed to a NOR gate. The output of NOR gate is fed to an inverter. The output of inverter is Read More »

Digital Electronics, Electronics And Communication Engineering

Consider a 565 PLL with RT = 10 kΩ and CT = 0.01 μF. What is the output frequency of the VCO?

Electronics And Communication Engineering, Exam Questions Papers /
Question: Consider a 565 PLL with RT = 10 kΩ and CT = 0.01 μF. What is the output frequency of the VCO?
[A].

10 kHz

[B].

5 kHz

[C].

2.5 kHz

[D].

1.25 kHz

Answer: Option A

Explanation:

No answer description available for this question.

Consider a 565 PLL with RT = 10 kΩ and CT = 0.01 μF. What is the output frequency of the VCO? Read More »

Electronics And Communication Engineering, Exam Questions Papers

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

Electronics And Communication Engineering, Networks Analysis And Synthesis /
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.

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 Read More »

Electronics And Communication Engineering, Networks Analysis And Synthesis