Concept explainers
Why will dust be attracted to a CD wiped with a dry cloth?
To explain: The reason for dust to be attracted to a CD if it is wiped with a dry cloth.
Explanation of Solution
Introduction:
According to the charge conservation principle, an electron is neither created nor destroyed. They are attracted or repelled from one surface to another to conserve the quantity.
When a CD is wiped with a dry cloth, then due to rubbing, charges re-distribute over the surface. This produces static charges on the surface of a CD. These static charges balance the electrons with the nearby dust particles.
Conclusion:
Thus, due to static charges, dust particles are attracted to the surface of a CD.
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