How many electrons are in 1 Coulomb?

One coulomb is defined as the amount of electric charge that is transported by a constant current of one ampere in one second. To determine how many electrons contribute to this amount of charge, we use the fundamental charge of a single electron, which is approximately ( 1.6 \times 10^{-19} ) coulombs.

To find the number of electrons in one coulomb, the calculation involves dividing one coulomb by the charge of a single electron:

[

1 , \text{C} = \frac{1 , \text{C}}{1.6 \times 10^{-19} , \text{C/electron}} \approx 6.25 \times 10^{18} , \text{electrons}

]

This calculation reveals that there are about ( 6.25 \times 10^{18} ) electrons in one coulomb, confirming that this is indeed the correct answer. Understanding the relationship between electrical charge and the number of electrons is fundamental in both physics and medical imaging techniques involving fluoroscopy, where control and measurement of electrical charge are critical for producing images.