Electronic Devices and Circuits Questions and Answers – Limiting and Clamping Circuits and Some Special Types of diodes

This set of Electronic Devices and Circuits Question Bank focuses on “Limiting and Clamping Circuits and Some Special Types of diodes”.

1. Which of the following circuits can be used as limiter or clamper or both?
a)The following circuits can be used as limiter or clamper or both - option a
b)The following circuits can be used as limiter or clamper or both - option b
c)The following circuits can be used as limiter or clamper or both - option c
d) All of the mentioned
View Answer

Answer: d
Explanation: Each of the circuit can be either as a clamper or limiter or both.

2. The V0 vs VI curve for the below circuit is
The V0 vs VI curve for the circuit is characteristics correctly
a) The V0 vs VI curve for the below circuit - option a
b) The V0 vs VI curve for the below circuit - option b
c) The V0 vs VI curve for the below circuit - option c
d) The V0 vs VI curve for the below circuit - option d
View Answer

Answer: d
Explanation: Only this curve represents the characteristics correctly.

3. For the circuit and the input signal shown which of the following is true for the output voltage?
The output waveform is a square wave with lowest peak clamped to 0V for the output voltage
a) The output waveform is a square wave with lowest peak clamped to 0V
b) The output wave is a square wave with lowest peak clamped to -6V
c) The output waveform is a square wave with highest peak clamped to 4V
d) The output waveform is a straight line with the value of output voltage equal to 10V
View Answer

Answer: a
Explanation: It is a clamped capacitor circuit.
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4. Which of the following is not true for the duty cycle of a waveform?
a) Duty cycles can be used to describe the percent time of an active signal in an electrical device
b) Duty cycle can be used to determine the percentage of the time a signal is active
c) 60% duty cycle means that the waveform is active for 40% of the total time
d) 50% duty cycle means that the waveform is non-active for 50% of the total time
View Answer

Answer: c
Explanation: 60% duty time means that a signal is active for 60% of the total time.

5. The maximum and the minimum voltage across the diode D1 respectively is
The maximum & the minimum voltage across the diode D1 is 0V & -2Vp
a) 2Vp and 0V respectively
b) 0V and -2Vp respectively
c) Vp and -Vp respectively
d) 2Vp and Vp respectively
View Answer

Answer: b
Explanation: It is a voltage doubler circuit.
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6. Limiting and clamping circuits are employed in
a) FM transmitters
b) Television receivers and transmitter
c) Production of various signal waveforms such as trapezoidal, square or rectangular waves
d) All of the mentioned
View Answer

Answer: d
Explanation: All of the given are uses of limiting and clamping circuits.

7. Which of the following is not true for a Schottky-Barrier Diode (SBD)?
a) It is formed by bringing metal into contact with a moderately doped n-type semiconductor material.
b) In the SBD, current is conducted by mainly by minority carriers.
c) The forward voltage drop of a conducting SBD is lower than that of a pn-junction diode.
d) SBD are used in the design of a special form of bipolar-transistor logic circuits
View Answer

Answer: d
Explanation: Current is conducted largely by electrons which are majority current carriers.
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8. Photodiodes are part of
a) Optoelectronics
b) High Intensity Discharge
c) Low pressure Discharge
d) None of the mentioned
View Answer

Answer: a
Explanation: Optoelectronics are also called photodiodes.

9. Which of the following is true for LEDs
a) The light emitted by a LED is inversely proportional to the current flowing through the diode
b) LED operate in a manner opposite to the working of the optoelectronics or photodiodes
c) LED cannot be used to generate coherent source of light
d) None of the mentioned
View Answer

Answer: b
Explanation: The working of the optoelectronics is opposite to that of the LEDs.
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10. Optoisolator is
a) A combination of LED and varactor in the same package
b) A combination of a varactor and photodiode in the same package
c) A combination of LED and a photodiode in the same package
d) A combination of photodiode and Schottky-Barrier Diode in the same package
View Answer

Answer: c
Explanation: By definition, an optoisolator is a package containing both LED as well as a photodiode.

Sanfoundry Global Education & Learning Series – Electronic Devices and Circuits.

To practice Electronic Devices and Circuits Question Bank, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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