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Power Electronics

Power Electronics
The device that does not have the gate terminal is ___________.

FET
SCR
Triac
Diac

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Power Electronics
Which of following devices has highest di/dt and dv/dt capability?

 SCR.
 SIT.
 SITH.
  GTO.

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Power Electronics
During reverse recovery time

  both B and C.
 charge carrier of junction J1 is swept out.
 charge carrier of junction J3 is swept out.
 charge carrier of junction J2 recombined.

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Power Electronics
A diac is turned on by ___________.

A breakover voltage
Gate voltage
Gate current
None of these

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Power Electronics
Spread time is defined as the interval during which

 anode voltage drops from 10 % of its initial value to zero.
 anode current rises from 10 % to 90 % of its final value.
  anode current rises from 90 % to its final value.
 both (A) and (B).

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Power Electronics
Example of a voltage clamping device

  metal oxide varistor.
 fast acting fuse.
 aluminium block.
 snubber circuit.

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