<div class=\"column\"> <p><span>Two infinitely wide, horizontal sheets have equa

Question

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<p><span>Two infinitely wide, horizontal sheets have equal and opposite charge density. What principle lies behind the fact that the electric field either above the upper sheet or below the lower sheet is exactly zero? </span></p>
<p><span>A. conservation of charge<br /> B. conservation of momentum C. conservation of energy<br /> D. linear superposition<br /> E. commutative property&#160;</span></p>
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Explanation / Answer

D. Linear Superposition

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