Category: Power Electronics

A. Zero
B. Switches between – 1 / 2 and + 1 / 2
C. Switches between – 1 and + 1
D. Switches between 0 and + 1

A. Noise
B. Distortion
C. Interference
D. All of these

A. DIAC conducts in forward direction and TRIAC conducts in reverse direction
B. Both conducts in forward direction
C. Both conducts in reverse direction
D. Both conducts in either direction

A. Breakdown of junction
B. Local hot spot
C. Insulation failure
D. None of these

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. Flyback capacitor
B. Flyback resistor
C. Flyback transformer
D. Flyback transistor

A. AC switch
B. DC switch
C. Both a and B
D. Square wave switch

A. AC input power to the transformer volt – amp rating required by secondary
B. AC input power to the transformer volt – amp rating required by primary
C. DC output power to the transformer volt – amp rating required by secondary
D. DC output power to the transformer volt – amp rating required by primary

A. Both harmonic distortion and quality of input current increases
B. Harmonic distortion increases and quality of input current decreases
C. Harmonic distortion decreases and quality of input current increases
D. Both harmonic distortion and quality of input current decreases

A. Voltage across the commutating inductances collapses
B. The capacitance voltage adds to the supply voltage
C. Both A. and B.
D. None of these