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Power Electronics

Power Electronics
The typical time of rising time lies between

  1 - 4 µs.
 40 - 60 µs.
 10 - 20 µs.
 90 - 100 µs.

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Power Electronics
Which of following is not a power transistor?

  TRIAC.
 SITS.
 IGBTs.
 COOLMOS.

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Power Electronics
Materials used in heat sink should have

  All of these.
 high thermal conductivity.
 high melting point.
 large surface area.

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Power Electronics
A thyristor can termed as

  DC switch.
 Square wave switch.
 Both a and B.
 AC switch.

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Power Electronics
Which of the following is not a characteristic of UJT?

Bilateral conduction
Negative resistance
Peak-point voltage
Intrinsic stand off ratio

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Power Electronics
Maximum power loss occurs during

  rise time.
 spread time.
 delay time.
 all.

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