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Which circuit element reduces the load on the ignition switch contacts?

  • A.A resistor
  • B.A diode, which permits the current to flow in one direction only and therefore protects the switch from a reverse spike
  • C.A starter relay
  • D.A fusible link, which protects the circuit against a short and therefore reduces the current that the switch carries

Answer: C

The switch carries only the relay coil current of a few amps rather than the solenoid current of thirty or more. Diodes genuinely are fitted across relay coils to absorb the spike, which makes the last option a real component with a different purpose. Reading the definition literally, rather than recalling a summary, avoids the usual confusion. The shared behaviour explains why these belong together and the differences explain why both exist.

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