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Which purpose does the condenser or capacitor serve?

  • A.Increasing the rate at which the primary field collapses, which raises the voltage induced within the secondary winding
  • B.Suppressing the arc across the opening contacts
  • C.Storing the energy required for the spark, which is released into the coil when the contacts open during operation
  • D.Smoothing the supply

Answer: B

Without it the self induced voltage arcs across the points, burning them and slowing the collapse. Suppressing that arc genuinely does speed the collapse and raise the output, which makes the last option a real consequence of the same action. The order in which the effects act is what decides the outcome, so it is worth establishing first. Tracing the requirement back to the physical constraint that produces it makes the answer follow. The quantity that varies and the quantity that does not are worth naming before any substitution is attempted.

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