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A. How many Coulombs are there in one fundamental/elementary charge?B. How many electrons are there in one coulomb of negative charge?

Sagot :

(A). The number of Coulombs in one fundamental charge of an electron is,

[tex]1e\text{ = 1.}6\times10^{-19}\text{ C}[/tex]

(B). The charge in terms of the number of electrons is,

[tex]q=ne[/tex]

where q is the net charge, e is the fundamental charge and n is the number of electrons,

For the net charge of q = 1 Coulomb, the number of electrons is,

[tex]\begin{gathered} 1\text{ C=n}\times1.6\times10^{-19}\text{ C} \\ n=\frac{1}{1.6\times10^{-19}} \\ n=0.625\times10^{19} \\ n=6.25\times10^{18}\text{ } \end{gathered}[/tex]

Thus, the number of electrons in the 1 Coulomb of charge is,

[tex]6.25\times10^{18}[/tex]