Question

If the charge of an electron is 1.6x10^-19C, find the approximate number
of electrons in 3 coulombs.​

Answer 1

Answer:

No. of electrons that have 1.6x10^-19 C of charge =1

No. of electrons that have 1 C of charge = 1/1.6*10^-19

=10^19/1.6=6.25*10^18 electrons

number of electrons in 3 C of charge=number of electrons in 1 C of charge*3

=6.25*10^18*3

=1.875*10^19 electrons

"*"is multiply

Answer 2

Step-by-step explanation:

Q = ne

n = Q/e

n = 1/1.6×10−¹⁹

n = 1×10¹⁹/1.6

n = 0.625×10¹⁹

n =6.25×10¹⁸

n =6×10¹⁸( approx)

Number of electrons in 1 coulomb = 6×10¹⁸ Electrons

So the number of electrons in 3 coulomb = 3×6×10¹⁸

=18×10¹⁸

=1.8×10¹⁹