Power Electronics - Study Mode
[#76] The operating state that distinguishes a silicon controlled rectifier (SCR) from a diode is
Correct Answer
(B) Forward blocking state
[#77] For a type A chopper, DC source voltage is 240 V. Calculate the average output voltage is the duty cycle is 0.4. Take a voltage drop of 4 V across the chopper when it is on.
Correct Answer
(C) 94.4 V
[#78] If firing angle in an SCR circuit is increased, the output . . . . . . . .
Correct Answer
(C) Is decreased
[#79] In a thyristor, the minimum current required to maintain the device in the 'ON' state is called
Correct Answer
(C) Holding current
[#80] For a single phase fully controlled converter bridge operating with continuous load current, the converter will operate in inverting mode for triggering angle, $$alpha $$, such that:
Correct Answer
(B) $$frac{pi }{2} < alpha < pi $$