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Power Electronics

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

 23 mA.
 40 mA.
 60 mA.
  10 mA.

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Power Electronics
The triac is ___________.

Like a bidirectional SCR
A four-terminal device
None of these
Not a thyristor

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Power Electronics
Leakage current flows through the thyristor in

 forward blocking mode.
  both forward and reverse blocking mode.
 forward conduction mode.
 reverse blocking mode.

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Power Electronics
A triac has ___________ semiconductor layers.

Three
Two
Five
Four

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Power Electronics
The device that exhibits negative resistance region is ___________.

UJT
Transistor
Diac
Triac

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Power Electronics
For an SCR gate cathode characteristic is a straight line of 130. For triggered source volume of 15 V and allowable gate power dissipation of 0.5 W compute the gate source resistance?

 11.19 ohm
 108 ohm
 115 ohm
  111.9 ohm

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