Question

The charge carried by 12.5×10^8electtons is

Answer 1

Answer:

One coulomb is the fundamental SI unit of charge. It is defined as the charge in one Ampere of current passed for one second.

Now for an electron, the amount of charge it carries is 1.6*10^-19 C.

So for making a charge of one Coulomb, the number of electrons required will be:

n = 1/(1.6*10^-19)

n = 6.25*10^18 number of electrons

Here, number of electrons is given as 12.5*10^18 electrons. Charge on an electron is 1.6*10^-19 C.

Thus, the charge carried by the electrons is:

Q = n*e

Q = (12.5*10^18)*(1.6*10^-19)

Q = 2 C.

These number of electrons carry a charge of two Coulomb

Answer 2

1 electron carries a charge of -1.6*10^-19C

12.5*10^8 electrons will carry a charge of -12.5*1.6*10^-11C

which is equal to 20*10^-11C or 2*10^-10C

Well that’s pretty impressive because, you take the amount of electrons that is roughly 4 times, the amount of metres travelled by light in one second, to only get a charge of -2 in every 10 billion C

Thats pretty cool!!!