Question

Calculate the number of electron constitution one coulombs of charge.

Answer 1

Dear ....

Solution here
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We know that the charge. of an electron is 1.6 × 10^-19. coulomb (or 1.6 × 10^-19 C).

Now, if charge is 1.6 × 10^-19 C, no. of electron =1

so,

If charge is 1 C, than No. of electron
$= \frac{1}{1.6 \times {10}^{ - 19} } \times 1 \\ \\ = \frac{ {10}^{19} }{1.6} \\ \\ = \frac{10}{1.6} \times {10}^{18} \\ \\ = 625 \times {10}^{18}$
Thus, 6.25 × 10^18 electrons taken together constitute 1 coulomb of charge .

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Answer 2

Given that

Charge (Q) = 1 C

Electron (e) = 1.6× 10^-19

Number of electron (n) = ?

Q= ne

1 C = n × 1.6×10^-19 C

n = 1/(1.6×10^-19)

n = 6.25 × 10^18 electron