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In a flyback converter, the inductor of the buck-boost converter has been replaced by a__________?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__________?

Which statement is true ?

A. Reverse recovery time ( trr ) > gate recovery time (tgr)
B. Device turn OFF time ( tq ) > reverse recover time (trr)
C. Circuit turn OFF time > device turn OFF time ( tq )
D. All of these

Correct Answer: All of these ✔

Last Updated: October 20, 2018