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Power Electronics
After proper turn on of thyristor
gate signal should present but can be removed.
gate signal must be removed.
None of these
gate signal is always present.
gate signal should present but can be removed.
gate signal must be removed.
None of these
gate signal is always present.
Answer
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Related Question
Power Electronics
What is used to protect the SCR from over current ?
Snubber circuit.
Heat sink.
Voltage clamping device.
CB and fuse.
Snubber circuit.
Heat sink.
Voltage clamping device.
CB and fuse.
Answer
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Power Electronics
A triac has ___________ semiconductor layers.
Three
Five
Two
Four
Three
Five
Two
Four
Answer
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Power Electronics
Maximum di / dt in a SCR is
inversely proportional to Vm of supply voltage.
both A and C.
inversely proportional to L in the circuit.
directly proportional to Vm of supply voltage.
inversely proportional to Vm of supply voltage.
both A and C.
inversely proportional to L in the circuit.
directly proportional to Vm of supply voltage.
Answer
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Power Electronics
The UJT may be used as ___________.
None of these
A sawtooth generator
Am amplifier
A rectifier
None of these
A sawtooth generator
Am amplifier
A rectifier
Answer
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Power Electronics
Power electronics essentially deals with control of a.c. power at ___________.
50 Hz frequency
Frequencies less than 10 Hz
Frequencies above 20 kHz
Frequencies above 1000 kHz
50 Hz frequency
Frequencies less than 10 Hz
Frequencies above 20 kHz
Frequencies above 1000 kHz
Answer
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