1000+ Power Electronics Questions and Answers Pdf - 2

Question: 6

An inter-group reactor is used in a single phase cycloconverter circuit to

(A) limit circulating current

(B) limit di/dt in the semiconductor switch

(C) reduce voltage ripples

(D) reduce current ripples

Question: 7

Which of the following converters can feed power in any of the four quantities?

(A) combination of a semi and full converter

(B) semi-conductor

(C) dual converter

(D) full converter

Question: 8

In cycloconverter speed control of an induction motor, cycloconverter frequency

(A) is always less and about one third of supply frequency

(B) can be higher or lower than supply frequency

(C) is higher than the supply frequency

(D) is equal to that of supply frequency

Question: 9

A single phase IGBT bridge inverter, compared to a single pulse PWM control, multiple pulse PWM

(A) gives lower harmonic content in the output voltage

(B) requires more number of switching devices

(C) gives higher maximum ems output voltage

(D) gives higher harmonic content in output voltage

Question: 10

Anode current in an SCR consists of

(A) holes only

(B) electrons only

(C) both electron and holes

(D) either electron or holes