Discussion
Which practice reduces the spike risk when disconnecting jump leads?
Answer: C
A resistive load absorbs the inductive energy so the spike has somewhere to go. The negative lead is removed first for the same reason the battery is disconnected earth first. Speed of disconnection makes no difference to the spike. Tracing the requirement back to the physical constraint that produces it makes the answer follow. The order in which the effects act is what decides the outcome, so it is worth establishing first.
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