41. In the conduction region, the dynamic resistance of the SCR is typically ________ to ________.
(a) 0.01 , 0.1
(b) 1 , 10
(c) 50 , 100
(d) 500 , 10 k
42. The method(s) for turning off an SCR is (are) categorized as ________.
(a) current interruption
(b) forced commutation
(c) both current interruption and forced commutation
(d) None of the above
43. The SCRs have typical turn-on times of ________ in the regeneration action.
(a) 0.1 μs to 1 μs
(b) 0.1 ms to 1 ms
(c) 3 ms to 5 ms
(d) 5 ms to 9 ms
44. ________ are areas of application for SCRs.
(a) Relay controls
(b) Time-delay circuits
(c) Motor controls
(d) All of the above
45. The four-layer devices with a control mechanism are commonly referred to as ________.
(a) thyristors
(b) transistors
(c) diodes
(d) None of the above
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