Q. In a single phase semi-converter the number of thyristors is

View solution

Q. A dc chopper is feeding an RLE load. The current can become discontinuous if

View solution

Q. Which of these commutation methods uses two leads?

View solution

Q. In rectifier circuits, the rms value of ac component of output voltage is equal to

View solution

Q. A UJT exhibits negative resistance characteristics when

View solution

Q. In rectifier circuits, ripple factor RF and form factor FF are related as

View solution

Q. If we connect two silicon unilateral switches in anti- parallel we get

View solution

Q. A single phase half wave rectifier is feeding a resistive load. As firing angle is increased

View solution

Q. A cycloconverter for single phase operation has

View solution

Q. A chopper is a high efficiency circuit.

View solution

Q. The difference between resonant commutation and self commutation is

View solution

Q. Which of these devices have four layers?

View solution

Q. When UJT is used for thyristor gate signal, the output of UJT is

View solution

Q. The stud in a stud mounted SCR acts as

View solution

Q. In a single phase full wave regulator feeding R-L load, short gate pulse are not suitable.

View solution

Q. Half bridge and full bridge inverters of one type use different commutation methods.

View solution

Q. Assertion (A): An ac regulator uses natural commutation

Reason (R): An ac regulator can be used for static on load tap changing of transformer.

View solution

Q. When a UJT is used as a relaxation oscillator the current should be

View solution

Q. In auxiliary commutated chopper, the charging and discharging time of capacitor

View solution

Q. Which chopper circuit uses saturable reactor?

View solution