Q. A single phase bridge type cycloconverter uses eight thyristors.

View solution

Q. In the basic series inverter circuit, the source supplies load

View solution

Q. In a 3 phase bridge inverter with 180° mode of operation the numbers of thyristors conducting at one time are

View solution

Q. A single phase full converter can operate in

View solution

Q. In a 3 phase semiconverter, the freewheeling diode comes into operation only if firing angle

View solution

Q. A full bridge inverter is fed by a battery of 30 V. The rms value of output voltage is

View solution

Q. The total number of leads in SUS, SBS and SCS respectively are

View solution

Q. Which of these devices can conduct in both directions?

View solution

Q. Assertion (A): A half wave controlled rectifier has poorer efficiency and higher ripple factor than a full wave controlled rectifier.

Reason (R): The use of a freewheeling diode in half wave controlled rectifier circuit improves the waveform of load current and circuit power factor.

View solution

Q. A 3 phase dual converter consists of

View solution

Q. Which inverter circuit uses coupled inductors?

View solution

Q. If the frequency is less than the damped frequency in a series- inverter

View solution

Q. The output frequency of a cycloconverter can be changed by changing the firing angle.

View solution

Q. Mc Murray full bridge inverter uses

View solution

Q. Assertion (A): A DIAC has four layers but only two terminals.

Reason (R): A DIAC can conduct in both directions.

View solution

Q. In a 3 phase full converter, the instantaneous output voltage can have negative part if

View solution

Q. A single phase half bridge inverter required to feed R-L loads needs

View solution

Q. Typical values of di/dt (A/µ sec) and dv/dt (v/µ sec) for an SCR are in the range of

View solution

Q. When a dc chopper feeds an RLE load, the load current, during steady state operation

View solution

Q. When an SCR is in forward blocking mode, the applied voltage

View solution