Question

A battery moves 1.88 × 1018 electrons in an electric circuit. How many coulombs of charge were moved? and If it takes 0.5 s for the electrons to move, what is the current in the circuit?

Answer 1

Take into account the following equivalence between number of electrons and 1 Coulomb:

`1C=6.2415\cdot10^(18)electrons`

Then, by using the previous equality, you have:

`1.88\cdot10^(18)\text{electrons}\cdot\frac{1C}{6.2415\cdot10^(18)\text{electrons}}=0.3C`

Then, approximately 0.3 coulombs of charge were moved.

And the current in the circuit is:

`I=(0.3C)/(0.5s)=0.6A`

The current in the circuit is 0.6A