Silicon Controlled Rectifiers - Study Mode
[#16] The normal way to turn on a SCR is by ___________
Correct Answer
(C) Appropriate gate current
[#17] An SCR is turned off by ___________
Correct Answer
(A) Reducing anode voltage to zero
[#18] If firing angle in an SCR circuit is increased, the output ___________
Correct Answer
(C) Is decreased
Explanation
Solution: If the firing angle in an SCR (Silicon Controlled Rectifier) circuit is increased, the output is decreased . The firing angle refers to the delay angle between the triggering signal and the conduction of the SCR. By increasing the firing angle, the SCR is triggered later in each cycle of the AC input voltage. This results in a shorter conduction period and therefore a decreased output from the SCR. Therefore, the correct answer is Option C: Is decreased.
[#19] When an SCR is turned on, the voltage across it is about ___________
Correct Answer
(D) 1 V
[#20] The control element of an SCR is ___________
Correct Answer
(D) Gate