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Which resistance does a coil secondary winding typically show?

  • A.Infinity
  • B.A few hundred ohms, which reflects the fine wire used for the many turns of the secondary winding of the coil
  • C.Several thousand ohms
  • D.Less than one ohm, which is required in order to deliver the current needed to produce the spark at the plug

Answer: C

Secondary windings measure from around five to twenty thousand ohms depending on the design. Low resistance belongs to the primary. Infinity means an open circuit winding and a failed coil. Naming what changes and what stays the same is the reliable route through questions of this shape. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision. Tracing the requirement back to the physical constraint that produces it makes the answer follow.

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