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Power Electronics
The turn-on time of an SCR with inductive load is 20 µs. The puls train frequency is 2.5 KHz with a mark/space ratio of 1/10, then SCR will
Turn on if inductance is removed.
Turn on.
Turn on if pulse frequency us increased to two times.
Not turn on.
Turn on if inductance is removed.
Turn on.
Turn on if pulse frequency us increased to two times.
Not turn on.
Answer
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Related Question
Power Electronics
Maximum di / dt in a SCR is
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.
inversely proportional to Vm of supply voltage.
both A and C.
Answer
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Power Electronics
Which statement is true for latching current ?
It is related to conduction process of device.
It is related to turn on process of the device.
Both C and D.
It is related to turn off process of the device.
It is related to conduction process of device.
It is related to turn on process of the device.
Both C and D.
It is related to turn off process of the device.
Answer
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Power Electronics
For series connected SCR’s dynamic equalising circuit consists of
R and C in series but with diode across C.
series R and diode with C across R.
series R and diode with C across R.
R and C in series but with diode across R.
R and C in series but with diode across C.
series R and diode with C across R.
series R and diode with C across R.
R and C in series but with diode across R.
Answer
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Power Electronics
SITH is also known as
Filled controlled rectifier.
Silicon controlled rectifier.
None of these.
Filled controlled diode.
Filled controlled rectifier.
Silicon controlled rectifier.
None of these.
Filled controlled diode.
Answer
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Power Electronics
After peak point, the UJT operates in the ___________ region.
None of these
Cut-off
Saturation
Negative resistance
None of these
Cut-off
Saturation
Negative resistance
Answer
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