We can control a.c. power in a load by connecting ______________?
Correct answer: C. Two SCRs in parallel opposition
- A. Two SCRs in series
- B. Two SCRs in parallel
- C. Two SCRs in parallel opposition
- D. None of the above
Explanation
Two SCRs connected in anti-parallel, or parallel opposition, conduct on alternate half-cycles and allow bidirectional AC power control. Ordinary series or parallel connection does not provide this complementary half-cycle operation.
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