Practice MCQ Questions and answers on Power Electronics Mcqs

A. Identical to line voltage in a VSI

B. Identical to line current in VSI

C. Identical to phase voltage in VSI

D. Identical to phase voltage in CSI

A. Dependent on the load current

B. Dependent on the voltage

C. Dependent on both the load current and load voltage behind the short circuit current

D. Independent on both the load current and load voltage

A. Suppressing emissions

B. Reducing the efficiency of the coupling path

C. Reducing the susceptibility of the receptor

D. All of these

A. silicon has large leakage current than germanium

B. silicon has small leakage current than germanium

C. silicon has small leakage voltage than germanium

D. silicon has large leakage voltage than germanium

A. two SCR’s in parallel opposition

B. two SCR’s in series

C. three SCR’s in series

D. four SCR’s in series

A. Duty ratio only

B. Frequency only

C. Duty ratio and frequency

D. Duty ratio, frequency and time delay

A. Electrical power developed in armature – copper losses

B. Mechanical power input – iron and friction losses

C. Electrical power developed in armature – iron and copper losses

D. Mechanical power input – iron and friction losses – copper losses

A. It will rotate at the same speed as that with its field winding closed

B. It will rotate at less speed as that with its field winding closed

C. It will rotate at dangerously high speed

D. None of these

A. Load survey method

B. Mathematical method

C. Statistical method

D. Economic parameters

A. Frequencies above 20 kHz

B. Frequencies above 1000 kHz

C. Frequencies less than 10 Hz

D. 50 Hz frequency