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Power Electronics

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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Power Electronics
Power transistor are type of

 MOSFETs.
 BJTs.
  All of above.
 IGBTs.

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Power Electronics
Under over voltage condition impedance offered by the voltage clamping device is

 infinity.
 moderate.
  low.
 high.

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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
  111.9 ohm
 115 ohm
 108 ohm

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Power Electronics
In a UJT, the p-type emitter is ___________ doped

Lightly
Heavily
None of these
Moderately

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Power Electronics
Materials used in heat sink should have

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

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