An SCR can exercise control over____________of a.c. supply?

A. Positive half-cycles only
B. Negative half-cycles only
C. Both positive and negative half-cycles
D. Positive or negative half-cycles

In an SCR circuit the supply voltage is generally ___________ that of breakover voltage?
A. Equal to B. Less than C. Greater than D. None of the above...
When SCR is OFF, the current in the circuit is ________________?
A. Exactly zero B. Small leakage current C. Large leakage current D. None of the above...
In an SCR circuit, the angle of conduction can be changed by__________________?
A. Changing anode voltage B. Changing gate voltage C. Reverse biasing the gate D. None of the above...
If gate current is increased, then anode-cathode voltage at which SCR closes_________________?
A. Is decreased B. Is increased C. Remains the same D. None of the above...
An SCR has ___________semiconductor layers?
A. Two B. Three C. Four D. None of the above...
An SCR has __________ pn junctions?
A. Two B. Three C. Four D. None of the above...
When an SCR is turned on, the voltage across it is about _____________?
A. Zero B. 10 V C. 1 V D. 1 V...
An SCR combines the features of ____________?
A. A rectifier and resistance B. A rectifier and transistor C. A rectifier and capacitor D. None of the above...
An SCR is turned off by _________________?
A. Reducing anode voltage to zero B. Reducing gate voltage to zero C. Reverse biasing the gate D. None of the above...
The control element of an SCR is ______________?
A. Cathode B. Anode C. Anode supply D. Gate...