21. |
A 230V, 50Hz, single-pulse SCR is feeding a RL load with α = 40° and β = 210°. Find the value of average output voltage
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Answer:
Option (c) |
22. |
A single-pulse transformer with secondary voltage of 230 V, 50 Hz, delivers power to bulb of R = 10 Ω through a half-wave controlled rectifier circuit. For α = 60°, find the average current in the bulb
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Answer:
Option (b) |
23. |
A single-pulse transformer with secondary voltage of 230 V, 50 Hz, delivers power to bulb of R = 10 Ω through a half-wave controlled rectifier circuit. For α = 60° and output AC power of 2127 Watts, find the rectification efficiency
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Answer:
Option (c) |
24. |
An SCR rectifier circuit is designed such that the average output voltage is 77.64 V & RMS value of output voltage is 145.873 V. Find the voltage ripple factor.
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Answer:
Option (c) |
25. |
Find the expression for the average value of the output voltage for the below given circuit. Consider the load current to be continuous, firing angle = α, transformer ration 1:1 and Vs = Vm sinωt.
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Answer:
Option (c) |
26. |
A fully controlled converter uses
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Answer:
Option (b) |
27. |
A single phase full-converter using R load is a _________ quadrant converter and that using an RL load without FD is a __________ quadrant converter
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Answer:
Option (c) |
28. |
The PIV for each diode in a single-phase, full converter with B-2 type (bridge) of controlled rectifier is_______________. Consider supply voltage as Vs = Vm sinωt.
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Answer:
Option (b) |
29. |
A single-phase full converter B-2 type (bridge) connection has a RLE type of motor load connected. The minimum requirement to turn-on the device is
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Answer:
Option (b) |
30. |
A motor load is connected to a single-phase full converter B-2 type controlled rectifier. The net energy is transferred from ac source to the motor (dc load) when
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Answer:
Option (b) |