Under normal operating condition voltage clamping device offers impedance of_________?

A. High value.
B. Low value.
C. Zero value.
D. Moderate value.

What is used to protect the SCR from over current ________________?

A. Cb and fuse.
B. Heat sink.
C. Snubber circuit.
D. Voltage clamping device.

If the anode current is 800 A, then the amount of current required to turn off the GTO is about____________?

A. 20 a
B. 200 a
C. 600 a
D. 400 a

In ac – dc conversion, when the switch is closed then the sum of voltages around the loop is____________?

A. Zero
B. Non zero
C. Equal to the sum of voltage when switch is open
D. Twice of the voltage when switch is open

An ideal switch is___________?

A. LoSSLess
B. Carry current in any direction when it is on
C. Does not carry any current in any direction when it is off
D. All of these

Electrical power output in a d.c. generator is equal to____________?

A. Electrical power developed in armature – copper losses
B. Mechanical power input – iron and friction losses
C. Electrical power developed in armature – iron and copper losses
D. Mechanical power input – iron and friction losses – copper losses

IGBT stands for___________?

A. Insulated gate bipolar transistor
B. Insulated gate bidirectional transistor
C. Inductive gate bipolar transistor
D. Inductive gate bidirectional transistor

The switching function of semiconductor devices can be characterized with___________?

A. Duty ratio only
B. Frequency only
C. Duty ratio and frequency
D. Duty ratio, frequency and time delay

Number of PN junction in an SCR is____________?

A. Two
B. Three
C. Four
D. Five

AC power in a load can be controlled by using____________?

A. Two scr’s in parallel opposition
B. Two scr’s in series
C. Three scr’s in series
D. Four scr’s in series