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Question
A certain particle carries 2.5 × 10-16 C of static electric charge. Calculate the number of electrons present in it.
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Solution
Charge on one electron = 1.6022 × 10-19 C
⇒ 1.6022 × 10-19 C charge is carried by 1 electron.
∴ Number of electrons carrying a charge of 2.5 × 10-16 C
`= 1/(1.6022xx10^(-19) " C")(2.5xx10^(-16) " C")`
`=1.560 xx 10^(3)" C"`
= 1560 C
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