Category: Power Electronics

A. Square
B. Sinusoidal
C. Triangular
D. Saw – tooth

A. Top switch of each leg is on at any instant
B. Bottom switch of each leg is on at any instant
C. Either A. or B.
D. None of these

A. Fuse.
B. Snubber circuit
C. Inductor
D. Voltage clamping device

A. Immunity
B. Emission
C. Interference
D. Electromagnetic compatibility

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. 120 degree after the zero crossing of the corresponding line voltages
B. 60 degree after the zero crossing of the corresponding line voltages
C. 120 degree before the zero crossing of the corresponding line voltages
D. 60 degree before the zero crossing of the corresponding line voltages

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. TRIAC
B. SCR
C. GTO
D. Only (a) and (b)

A. anode voltage drops from 10 % of its initial value to zero
B. anode current rises from 90 % to its final value
C. both (A) and (B)
D. anode current rises from 10 % to 90 % of its final value

A. Sine wave
B. Square wave
C. Saw – tooth wave
D. Trapezoidal wave