Computer Programming MCQs

5739 MCQs  (Page 104 of 574)

If the gate voltage of an SCR is removed, then the_______________?
A. Anode current decreases
B. Anode current does not decrease at all
C. Anode current increases
D. Cathode current increases
Anode of an operational SCR is _______________?
A. Always positive w.r.t cathode
B. Always negative w.r.t anode
C. Always positive w.r.t anode
D. Always negative w.r.t cathode
An SCR is made up of silicon because?
A. Silicon has large leakage current than germanium
B. Silicon has small leakage current than germanium
C. Silicon has small leakage voltage than germanium
D. Silicon has large leakage voltage than germanium
In a silicon controlled rectifier, the load is connected___________?
A. Across anode
B. In series with anode
C. Across cathode
D. In series with cathode
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
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
IGBT stands for___________?
A. Insulated gate bipolar transistor
B. Insulated gate bidirectional transistor
C. Inductive gate bipolar transistor
D. Inductive gate bidirectional transistor
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
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