An SCR is turned off when ________________?
(A) Anode current is reduced to zero
(B) Gate voltage is reduced to zero
(C) Gate is reverse biased
(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
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
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
We can control a.c. power in a load by connecting ______________?
(A) Two SCRs in series
(B) Two SCRs in parallel
(C) Two SCRs in parallel opposition
(D) None of the above
If firing angle in an SCR circuit is increased, the output _____________?
(A) Remains the same
(B) Is increased
(C) Is decreased
(D) None of the above
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