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Power Electronics
Which of the following is used in heat sink?
Carbon.
Aluminium.
Silver.
Iron.
Carbon.
Aluminium.
Silver.
Iron.
Answer
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Related Question
Power Electronics
Which of the following is not a characteristic of UJT?
Intrinsic stand off ratio
Bilateral conduction
Negative resistance
Peak-point voltage
Intrinsic stand off ratio
Bilateral conduction
Negative resistance
Peak-point voltage
Answer
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Power Electronics
Which following is a two terminal three layer device?
MOSFET.
Power dioed.
None of above.
BJT.
MOSFET.
Power dioed.
None of above.
BJT.
Answer
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Power Electronics
Latching current for an SCR inserted between a dc voltage source of 200 V and load is 100 mA. Compute the minimum rate of width pulse required to turn ON the SCR in case load consists of R = 20 Ω in series with L = 0.2 H.
150 µs.
100 µs.
200 µs.
300 µs.
150 µs.
100 µs.
200 µs.
300 µs.
Answer
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Power Electronics
When a UJT is turned ON, the resistance between emitter terminal and lower base terminal ___________
Is increased
None of these
Remains the same
Is decreased
Is increased
None of these
Remains the same
Is decreased
Answer
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Power Electronics
An SCR is considered to be a semi controlled device because
it can be turned OFF but not ON with a gate pulse.
it can be turned ON but not OFF with a gate pulse.
it conducts only during one half cycle of an alternating current wave.
it can be turned ON only during one half cycle of an AC.
it can be turned OFF but not ON with a gate pulse.
it can be turned ON but not OFF with a gate pulse.
it conducts only during one half cycle of an alternating current wave.
it can be turned ON only during one half cycle of an AC.
Answer
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