Explore topic-wise MCQs in Electrical Engineering Questions.

A single phase ac - dc converter is also known as

The square wave operation of 3 phase VSI lines contains the harmonics. The amplitudes are

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

To detect an over - current fault condition, the most reliable method is to connect a

A crowbar is a circuit which is used to protect a

An ideal switch is

Unipolar modulation is generally used in

In ac - dc conversion, when the switch is closed then the sum of voltages around the loop is

Transformer utilization factor is a measure of the merit of a rectifier circuit. It is the ratio of

A rectifier with an external low pass filter is an example of

In the SPWM, the modulating signal is

IGBT stands for

In constant frequency PWM, at perturbation the amplitude of the sinusoidal component is a

In a square - wave operation of 3 phase CSIs, the power values are on for

The transfer function of PWM is generally developed in

In variable frequency, PWM gain

An SCR can be used

Silicon controlled rectifier can be turned on

Number of PN junction in an SCR is

A carrier based PWM technique in CSI is composed of

TRIAC is a semiconductor power electronic device which contains

Anode of an operational SCR is

In a silicon controlled rectifier, the load is connected

The phase angle of gate signal in TRIAC can be shifted by using

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

In a 3 phase half wave rectifier, when firing angle is less than 90 degree, then the average dc output voltage becomes

With gate open, the maximum anode current at which SCR is turned off from ON condition is called

Form factor of a rectifier is the ratio of

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

Ripple factor is the ratio of

The ac voltage controller can be used for

An RC snubber network used in BJT

Regulator sampling PWM is usually used in

The opposite of susceptibility is

In square wave operation mode of 3 phase VSI, the VSI

DIAC and TRIAC both are semiconductors devices and conduct in

In a lossless inverter, the average power absorbed in one period by the load must be

If all the SCR’s of 3 phase PAC is replaced by diodes, they would be triggered

A step - down choppers can be used in

The output current in PWM DC - DC converters is equal to

A MOSFET, for its conduction uses

A combination of synchronized leading edge and trailing edge modulation has also been used to control a

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

MOSFET stands for

Advantages of Cuk converter is / are

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

The Graetz bridge makes excellent use of

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

If the firing angle becomes negative, then the rectifier begins to work as