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Power Electronics

Power Electronics
A thyristor can termed as

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

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Power Electronics
SITH is also known as

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

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Power Electronics
When the emitter terminal of a UJT is open, the resistance between the base terminal is generally ___________.

None of these
Low
High
Extremely low

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Power Electronics
A string of n parallel SCRs is operated at 72 KA, the rating of each SCR is 1 KA. If derating factor of the string is 0.1. Then calculate the value of n

 70.
 90.
 60.
  80.

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

More than
None of these
Equal to
Less than

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

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

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