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Power Electronics

Power Electronics
A triac has ___________ semiconductor layers.

Four
Two
Three
Five

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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.
 10 KV.
 2 KV.

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Power Electronics
When the temperature increases, the inter-base resistance (RBB) of a UJT ___________.

Remains the same
Decreases
Increases
None of these

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Power Electronics
A power semiconductor may undergo damage due to

 Low di/dt.
 High dv/dt.
 Low dv/dt.
  High di/dt.

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Power Electronics
After peak point, the UJT operates in the ___________ region.

None of these
Negative resistance
Saturation
Cut-off

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Power Electronics
Gate circuit or triggering circuit of a thyristor is

 high power circuit.
  lower power circuit.
 may be low power or high power circuit.
 magnetic circuit.

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