One coulomb of charge equals to the charge on how many Electrons

Electrical Engineering XYZ MCQs

One coulomb of charge equals to the charge on

1. 6.25 x 10¹⁶ electrons
2. 62.5 x 10¹⁶ electrons
3. 625 x 10¹⁶ electrons
4. 0.625 x 10¹⁶ electrons

Correct answer: 3. 625 x 10¹⁶ electrons

Explanation:

The charge of one electron is approximately −1.602×10⁻¹⁹ coulombs. To find out how many electrons constitute one coulomb of charge, you would use the formula:

Number of electrons = Charge in coulombs/Number of electrons​

Substituting one coulomb for the total charge and −1.602×10⁻¹⁹ coulombs for the charge of one electron:

Number of electrons = 1 C / 1.602×10⁻¹⁹

Number of electrons ≈ 625 × 10¹⁶ electrons