For similar carrier and modulating signals, the line current used in CSI is__________?
During the commutation period in 3 phase converter, overlap time is__________?
The effects of EMI can be reduced by__________?
An SCR is made up of silicon because__________?
AC power in a load can be controlled by using__________?
The switching function of semiconductor devices can be characterized with__________?
Electrical power output in a D.C. generator is equal to__________?
If a shunt motor is started with its field winding open then__________?
The power demand can be estimated approximately by__________?
Power electronics essentially deals with control of a.c. power at__________?
In a push – pull converter, the filter capacitor can be obtained as__________?
MOSFET stands for__________?
In a flyback converter, the inductor of the buck-boost converter has been replaced by a__________?
Advantages of Cuk converter is / are__________?
A MOSFET, for its conduction uses__________?
An RC snubber network used in BJT__________?
The ac output voltage waveform of VSI and AC output current waveform of CSI respectively is composed of__________?
If energy is taken from the AC side of the inverter and sends it back into the DC side, then it is known as__________?
A combination of synchronized leading edge and trailing edge modulation has also been used to control a__________?
Regulator sampling PWM is usually used in__________?
In a 3 phase VSI SPWM to use a single carrier signal and preserve the features of PWM technique, the normalized carrier frequency should be__________?
In square wave operation mode of 3 phase VSI, the VSI
For commutation in three phase PAC, normally balanced three phase voltages VR, VY and VB are connected to the three legs of the converter via__________?
If all the SCR’s of 3 phase PAC is replaced by diodes, they would be triggered__________?
The ability of an electronic system to function properly in its intended electromagnetic environment and should not be a source of pollution to that electromagnetic environment is known as__________?
The opposite of susceptibility is__________?
The output current in PWM DC – DC converters is equal to__________?
A step – down choppers can be used in__________?
In a lossless inverter, the average power absorbed in one period by the load must be__________?
The ac voltage controller can be used for __________?
In a full bridge VSI, in order to avoid the short circuit across the DC bus and the undefined AC output voltage condition, the modulating technique should ensure that__________?
The phase angle of gate signal in TRIAC can be shifted by using__________?
In the SPWM, the modulating signal is__________?
A TRIAC can be turned on with__________?
The transfer function of PWM is generally developed in__________?
DIAC and TRIAC both are semiconductors devices and conduct in__________?
The Graetz bridge makes excellent use of __________?
In constant frequency PWM, at perturbation the amplitude of the sinusoidal component is a__________?
If the firing angle becomes negative, then the rectifier begins to work as__________?
In variable frequency, PWM gain
In a 3 phase half wave rectifier, when firing angle is less than 90 degree, then the average dc output voltage becomes__________?
Transformer utilization factor is a measure of the merit of a rectifier circuit. It is the ratio of__________?
A carrier based PWM technique in CSI is composed of__________?
In a square – wave operation of 3 phase CSIs, the power values are on for__________?
Ripple factor is the ratio of__________?
Form factor of a rectifier is the ratio of __________?
Silicon controlled rectifier can be turned on__________?
TRIAC is a semiconductor power electronic device which contains__________?
The curve between V and I of SCR when anode is positive w.r.t cathode and when anode is negative w.r.t cathode are known as__________?
An SCR can be used__________?
With gate open, the maximum anode current at which SCR is turned off from ON condition is called__________?

With increase in firing angle,

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

Correct Answer: Harmonic distortion increases and quality of input current decreases ✔

Last Updated: October 20, 2018