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Assertion (A): Subsequent return strokes matter for induced voltages despite their lower peak current.
Reason (R): Their faster current rise time produces a larger rate of change of the field.

  • A.A is true but R is false
  • B.A is false but R is true
  • C.Both A and R are true, and R is the correct explanation of A
  • D.Both A and R are true, but R is not the correct explanation of A

Answer: C

Both are true and the reason gives the reason, and induced effects depend on the derivative rather than the peak. Surge protection design must account for both stroke types. First and subsequent strokes stress equipment differently.

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