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Power Electronics

Power Electronics
A diac is turned on by ___________.

A breakover voltage
Gate current
Gate voltage
None of these

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Power Electronics
The latching current of GTO should be of order

 100 mA.
 2 A.
  500 mA.
 1 A.

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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.

  100 µs.
 150 µs.
 300 µs.
 200 µs.

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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?

  111.9 ohm
 108 ohm
 11.19 ohm
 115 ohm

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Power Electronics
SITH is also known as

  Filled controlled diode.
 Silicon controlled rectifier.
 None of these.
 Filled controlled rectifier.

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

 40 mA.
  10 mA.
 60 mA.
 23 mA.

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