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Power Electronics

Power Electronics
To turn on UJT, the forward bias on the emitter diode should be ___________ the peak point voltage.

More than
Less than
Equal to
None of these

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Power Electronics
To meet high current demand we use SCRs in

 anti parallel connection.
  parallel connection.
 series connection.
 both B and C.

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Power Electronics
Which semiconductor device acts like a diode and two transistor?

 UJT.
 Diac.
  Triac.
 SCR.

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Power Electronics
Which of the following is used in heat sink?

 Iron.
 Carbon.
  Aluminium.
 Silver.

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Power Electronics
Calculate the maximum voltage that can be safely blocked by the string shown in figure, if maximum allowable leakage current is 2 mA?

 6 KV.
 10 KV.
 2 KV.
  8 KV.

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Power Electronics
What is used to protect a thyristor from high di / dt conditions?

 Voltage clamping device.
 Fuse.
  Inductor.
 Snubber circuit.

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