What reading would you expect of a square-wave current, switching rapidly between \( +0.5 \mathr...

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What reading would you expect of a square-wave current, switching rapidly between \( +0.5 \mathrm{~A} \) and \( -0.5 \mathrm{~A} \), when passed through an ac ammeter?
(1) 0
(2) \( 0.5 \mathrm{~A} \)
(3) \( 0.25 \mathrm{~A} \)
(4) \( 1.0 \mathrm{~A} \)
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