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Power Electronics

Power Electronics
A triac is a ___________ switch

None of these
Bidirectional
Unidirectional
Mechanical

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Power Electronics
Materials used in heat sink should have

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

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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.
  8 KV.
 2 KV.
 10 KV.

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Power Electronics
Thyristor is nothing but a

 Amplifier with higher gain.
 Controlled transistor.
 Amplifier with large current gain.
  Controlled switch.

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Power Electronics
ON state voltage drop across SCR lie between the range

 1.5 - 2 V.
  1 - 1.5 V.
 0.5 - 1 V.
 0 - 0.5 V.

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Power Electronics
A thyristor can termed as

 AC switch.
 Both a and B.
 Square wave switch.
  DC switch.

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