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Power Electronics

Power Electronics
A thyristor will be triggered when Vg = 1.5 volt and Ig = 100 mA in the given figure. Calculate the value of R in ohm is

 65.
  37.14.
 3.714.
 60.

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

Cut-off
Negative resistance
None of these
Saturation

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

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

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Power Electronics
Example of a voltage clamping device

 snubber circuit.
 aluminium block.
  metal oxide varistor.
 fast acting fuse.

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Power Electronics
Gate circuit or triggering circuit of a thyristor is

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

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Power Electronics
A Triac has three terminals viz ___________

None of these
Two main terminal and a gate terminal
Cathode, anode, gate
Drain, source, gate

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