In bipolar modulation, the carrier is symmetric about zero with amplitude equal to Cm, the PWM output

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

In the operation and control of both naturally commutated and forced commutated SCR base converter, commutation plays an important role. The converters is / are ___________?

A. Ac – dc
B. Dc – dc
C. Dc – ac
D. All of these

Double fourier series analysis of PWM is_____________?

A. Two dimensional functions
B. Three dimensional functions
C. One dimensional functions
D. All of these

In commutation PAC stands for_______?

A. Permanent angle converter
B. Phase angle converter
C. Phase angle commutation
D. Phase and commutation

The man made noise sources is / are_____________?

A. Motors
B. Switches, radio interferences
C. Computers, digital electronics
D. All of these

In single phase VSI, the harmonic which is not present is____________?

A. 2nd
B. 3rd
C. 5th
D. 7th

Any electrical signal present in a circuit other than the desired signal is known as______________?

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

Single phase VSI are mainly used in___________?

A. Power supplies
B. Ups
C. Multilevel configuration
D. All of these

Due to non sinusoidal waveform of the input current, the power factor of the rectifier is____________?

A. Negatively affected by firing angle
B. Negatively affected by distortion of the input current
C. Positively affected by both firing angle and distortion of the input current
D. Both (a) and (b)

In rectifiers, load current flow is_________?

A. Unidirectional
B. Bidirectional
C. Either (a) or (b)
D. Non directional