Q.1.
Dual converters provide
Q.2.
In voltage source inverters
Q.3.
In the three-phase bridge inverter, each step consists of
Q.4.
The load voltage of a chopper can be controlled by varying the..................
Q.5.
What are rheostats used for?
Q.6.
A single-phase semi-converter is having continuous conduction, as such each thyristor will conduct for an angle of
Q.7.
In the continuous conduction mode if the firing angle of the converter is increased beyond _________ degrees the converter operates in the _______ mode.
Q.8.
When a UJT is turned ON, the resistance between emitter terminal and lower base terminal ___________
Q.9.
The series-inverter control method is a/an..........
Q.10.
What is the duty cycle of a chopper ?
Q.11.
In a half wave bridge inverter circuit, the power delivered to the load by each source is given by
Q.12.
For a single phase thyristor circuit with R load & firing angle α, the conduction angle can be given by
Q.13.
In a UJT, the p-type emitter is ___________ doped
Q.14.
What is the purpose of a resistor?
Q.15.
Cycloconverter converts
Q.16.
A PWM switching scheme is used with a three phase inverter to
Q.17.
A UJT has ___________.
Q.18.
When the emitter terminal of a UJT is open, the resistance between the base terminal is generally ___________.
Q.19.
In case of circulating current type dual converters, the reactor is inserted between
Q.20.
The ____________ region in a power diode increases its reverse voltage blocking capacity.