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Power Electronics

Power Electronics
The latching current of SCR is 20 mA. Its holding current will be

 40 mA.
 23 mA.
 60 mA.
  10 mA.

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Power Electronics
Under normal operating condition voltage clamping device offers impedance of

 low value.
  high value.
 moderate value.
 zero value.

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Power Electronics
The V-I characteristics for a triac in the first and third quadrants are essentially identical to those of ___________ in its first quadrant

SCR
UJT
Transistor
None of these

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Power Electronics
Typical range of thyristor turn OFF time is

 3 - 10 µs.
  3 - 100 µs.
 3 - 50 µs.
 3 - 500 µs.

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Power Electronics
Thermal voltage VT can be given by

  Kq/T.
 qT/K.
 KT/q.
 (K2/q)(T + 1/T - 1).

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Power Electronics
The normal way to turn on a diac is by ___________.

Gate voltage
Gate current
Breakover voltage
None of these

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