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Electricity and Magnetism — PHYSICS STD 9 — Question

ICSE BoardEnglish MediumSTD 9PHYSICSElectricity and Magnetism1 Mark
Question
How many electrons are present in one coulomb?
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Answer

$Q = ne$
$N = Q/e = 1C / 1.6 x 10^{-19} = 6.25 x 10^{18}$

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