A single phase full bridge inverter can operate in load commutation mode in case load consists of____________?

A. Rl.
B. Rlc underdamped.
C. Rlc overdamped.
D. Rlc critically damped.

Thyristor can be protected from over voltages by using

A. 23 ma.
B. 40 ma.
C. 10 ma.
D. 60 ma.

Thyristor can be protected from over voltages by using____________?

A. Voltage clamping device.
B. Fuse.
C. Heat sink.
D. Snubber circuit.

Practical way of obtaining static voltage equalization in series connected SCRs is by the use of____________?

A. One resistor across the string
B. Resistors of the same value across each scr
C. Resistors of different values across each scr
D. One resistor in series with each scr

Switching frequency of SITH is____________?

A. 5 khz
B. 10 khz
C. 60 khz
D. 100 khz

Example of a voltage clamping device______________?

A. Fast acting fuse
B. Snubber circuit
C. Metal oxide varistor
D. Aluminium block

The maximum di/dt in a SCR is____________?

A. Directly proportional to supply voltage
B. Directly proportional to inductance in the circuit
C. Inversely proportional to supply voltage
D. Both a and b

The latching current of GTO should be of order

A. 100 ma
B. 500 ma
C. 1 a
D. 2 a

Under over voltage condition impedance offered by the voltage clamping device is__________?

A. Low
B. High
C. Moderate
D. Infinity

Which semiconductor device acts like a diode and two transistor?

A. Ujt
B. Diac
C. Triac
D. Scr