D:-750A
Correct Answer:- Option-C

Question54:-The turn ON time of a SCR with inductive load is 25 us. The pulse train
frequency is 2 kHz with a duty cycle of 1/10, then the SCR will

A:-turn ON
B:-not turn ON
C:-turn ON if inductance is removed
D:-turn ON if pulse frequency is increased twice
Correct Answer:- Option-A

Question55:-RC triggering is preferred over R triggering circuit because it
A:-ensures lower gate dissipation
B:-provides a larger range of the triggering angle
C:-protects the device from getting damaged
D:-cause quick triggering
Correct Answer:- Option-B

Question56:-For a single phase half controlled AC voltage converter, the output
voltage is 50% of maximum possible output voltage. The fixing angle is

A:-30°

B:-60°

C:-90°

D:-120°

Correct Answer:-Question Cancelled

Question57:-For a Buck converter, in order to reduce the conduction losses in the
diode,

A:-A low resistance MOSFET can be added in series with the diode

B:-A low voltage-drop IGBT can be added in anti parallel with the diode
C:-A low resistance MOSFET can be added in anti parallel with the diode
D:-A low voltage-drop IGBT can be added in series with the diode
Correct Answer:-Question Cancelled

Question58:-A three-phase diode bridge rectifier is feeding a constant DC current of
20 A to a highly inductive load. If three-phase 415 V, 50 Hz AC source is supplying
to this bridge rectifier, then the rms value of the current is each diode in ampere is

A:-20A

B:-14.14A

C:-11.55A

D:-10.15A

Correct Answer:- Option-C