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Which relationship holds between point gap and dwell angle?

  • A.A larger gap gives a smaller dwell
  • B.A larger gap gives a larger dwell, which is why the gap is increased when the dwell is found to be insufficient
  • C.No relationship
  • D.The two are independent, since dwell is determined by the profile of the cam rather than by the gap of the contacts

Answer: A

Opening the points wider makes them separate earlier and close later, reducing the closed period. Cam profile does set the maximum possible dwell, which makes the last option partly true. Setting one sets the other. The shared behaviour explains why these belong together and the differences explain why both exist. Reading the definition literally, rather than recalling a summary, avoids the usual confusion. A limit that survives making every external component ideal is an intrinsic one, and worth knowing for that reason.

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