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

A. Breakdown voltage
B. Peak reverse voltage
C. Holding current
D. Latching current

An SCR can be used___________?

A. As static conductor
B. For power control
C. For speed control of dc shunt motor
D. All of these

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_____________________?

A. Both as forward characteristics
B. Both as reverse characteristics
C. Former as forward characteristics and later as reverse characteristics
D. Former as reverse characteristics and later as forward characteristics

TRIAC is a semiconductor power electronic device which contains____________?

A. Two scr’s connected in reverse parallel
B. Two scr’s connected in parallel
C. Two scr’s connected in series
D. Two bjt’s connected in series

Silicon controlled rectifier can be turned on____________?

A. By applying a gate pulse and turned off only when current becomes zero
B. And turned off by applying gate pulse
C. By applying a gate pulse and turned off by removing the gate pulse
D. By making current non zero and turned off by making current zero

Form factor of a rectifier is the ratio of ______________?

A. Root mean square value of voltage and current to its peak value
B. Root mean square value of voltage and current to its average value
C. Average value of current and voltage to its root mean square value
D. Peak value of current and voltage to its root mean square value

Ripple factor is the ratio of______________________?

A. Rms value of the ac component of load voltage to the dc voltage
B. Average value of the ac component of load voltage to the peak value of voltage
C. Average value of the dc component of load voltage to the ac voltage
D. Peak value of the dc component of load voltage to the ac voltage

In a square – wave operation of 3 phase CSIs, the power values are on for___________?

A. 60 degree
B. 90 degree
C. 120 degree
D. 150 degree

A carrier based PWM technique in CSI is composed of____________?

A. A switching pulse generator and a shorting pulse generator
B. A shorting pulse distributor
C. A switching and shorting pulse combination
D. All of these

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

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