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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.

Equal to
None of these
Less than
More than

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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?

  111.9 ohm
 108 ohm
 11.19 ohm
 115 ohm

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Power Electronics
Compared to transistor, ______________ have lower on state conduction losses and higher power handling capability

  Thyristor.
 Semi conductor diodes.
 TRIACs.
 MOSFETs.

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Power Electronics
In a P1N1P2N2 thyristor which layer is less doped ?

  N1.
 N2.
 P2.
 P1.

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Power Electronics
A single phase full bridge inverter can operated in load commutation mode in case load consist of

 RLC overdamped.
 RLC underdamped.
 RL.
 RLC critically damped.

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Power Electronics
The triac is ___________.

Not a thyristor
Like a bidirectional SCR
None of these
A four-terminal device

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