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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

 3.714.
 60.
 65.
  37.14.

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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?

 108 ohm
  111.9 ohm
 11.19 ohm
 115 ohm

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Power Electronics
A thyristor can termed as

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

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Power Electronics
Thermal voltage VT can be given by

 KT/q.
  Kq/T.
 (K2/q)(T + 1/T - 1).
 qT/K.

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Power Electronics
The V-I characteristics for a triac in the first and third quadrants are essentially identical to those of ___________ in its first quadrant

SCR
None of these
UJT
Transistor

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Power Electronics
If a latching current for the circuit shown in figure is 2 mA. Obtain the value of minimum width of the property turn ON the SCR?

 3.1 µs
 3.2 µs
 3 µs.
  3.3 µs

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