Q. Which of the following commutation methods is the overall circuit under damped?

View solution

Q. Assertion (A): SUS is a PUT and avalanche diode connected between gate and cathode

Reason (R): SBS has two SUS inbuilt together and connected in anti-parallel

View solution

Q. In a single phase full wave controlled rectifier using centre tap transformer, the voltage across each half of secondary is Vm sin ωt. The peak inverse voltage is

View solution

Q. Which statement is correct?

View solution

Q. In a three phase series inverter, the firing frequency is

View solution

Q. A 3 phase fully controlled converter is a

View solution

Q. A cycloconverter is a group of controlled rectifiers.

View solution

Q. A single phase full wave regulator feeds a resistive load. The firing angle of thyristors is 90°. The input power factor is

View solution

Q. The leads in a TRIAC are denoted by

View solution

Q. A step down cycloconverter has an input frequency f. If it uses natural commutation, the output frequency

View solution

Q. In a single phase full wave regulator, the rms current in each thyristors is Ir The run load current is equal to

View solution

Q. In a half bridge inverter, the freewheeling diodes are needed

View solution

Q. When a thyristor is conducting, the voltage drop across it

View solution

Q. The advantage of modified series inverter with two inductors and two capacitors is

View solution

Q. An SUS is

View solution

Q. Which chopper circuit operates in quadrants 1 and 4?

View solution

Q. Which of the following devices has two gates?

View solution

Q. In auxiliary commutated chopper, the peak value of thyristor current is

View solution

Q. The static equalisation circuit for thyristors connected in series is

View solution

Q. The commutation method in an inverter, is

View solution