Q.1.
Between the peak point and the valley point of UJT emitter characteristics we have ___________ region
Q.2.
After peak point, the UJT operates in the ___________ region.
Q.3.
The device that exhibits negative resistance region is ___________.
Q.4.
When the emitter terminal of a UJT is open, the resistance between the base terminal is generally ___________.
Q.5.
A UJT is sometimes called ___________ diode.
Q.6.
The four quadrant operation of dual converters can be obtained by
Q.7.
A single phase full bridge inverter can operate in load commutation mode if load consists of
Q.8.
A single full converter alone can given a
Q.9.
Which device can be used in a chopper circuit?
Q.10.
Which of the following statements is correct in connection with the inverters?
Q.11.
The major advantage of using dual converters is that
Q.12.
In AC voltage controllers the
Q.13.
The values of duty cycle (α) lies between..........
Q.14.
The shape of the output voltage waveform in a single PWM is
Q.15.
In an inverter, if the fundamental frequency isHz, if third harmonic is eliminated, then frequencies of other components in the output voltage wave, in Hz, would be
Q.16.
The TRIAC is most sensitive in the _________ quadrants
Q.17.
All the modern AC-DC converters are using GTOs instead of SCRs because
Q.18.
In case of TRC (Time Ratio Control), _________ is varied
Q.19.
A voltage source inverter is normally employed when
Q.20.
In the ___________ type of chopper, two stage conversions takes place.