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- Question
If peak value of input voltage is Vm and firing angle is a, the average output voltage for single phase half wave and single phase full wave regulators are
Options- A.
- B.
- C.
- D.
- Correct Answer
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- 1. The attenuation characteristics of a loaded line is similar to that of
Options- A. low pass filter
- B. high pass filter
- C. band pass filter
- D. band stop filter Discuss
- 2. In a single phase full wave regulator feeding R-L load, short gate pulse are not suitable.
Options- A. True
- B. False Discuss
- 3. The household radio receiver uses
Options- A. synchronous
- B. envelope detector
- C. radio detector
- D. none of the above Discuss
- 4. Which chopper circuit uses saturable reactor?
Options- A. Auxiliary commutated
- B. Jones chopper
- C. Morgan chopper
- D. Load commutated Discuss
- 5. For an illumination control circuit it is advisable to use a matched TRIAC-DIAC pair.
Options- A. True
- B. False Discuss
- 6. Fibers have numerical aperture (NA) in the range of 0.15 to 0.4 Fibers with higher NA value would have
Options- A. reduced losses
- B. high bandwidth
- C. reduced losses and low bandwidth
- D. more losses and low bandwidth Discuss
- 7. Radar reciever has high sensitivity and low noise figure
Options- A. True
- B. False Discuss
- 8. A single phase electric heater uses phase controlled thyristors. The firing angle is 90°. The degree of heating is
Options- A. 25% of maximum
- B. 50% of maximum
- C. 75% of maximum
- D. none of the above Discuss
- 9. A characteristic property of crystal is its periodicity of structure.
Options- A. True
- B. False Discuss
- 10. The number of distinct Boolean expression of 4 variables is
Options- A. 16
- B. 256
- C. 1024
- D. 65536 Discuss
More questions
Correct Answer: band stop filter
Correct Answer: True
Correct Answer: envelope detector
Correct Answer: Morgan chopper
Correct Answer: True
Correct Answer: more losses and low bandwidth
Correct Answer: True
Correct Answer: 50% of maximum
Explanation:
Conduction occurs only during 50% of wave.
Correct Answer: True
Correct Answer: 65536
Explanation:
22n = 224 = 216 .
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