How many electrons will have a charge of one coulomb?
Correct answer: A. 6.2×10^18
- A. 6.2×10^18
- B. 5.2×10^18
- C. 6.2×10^19
- D. 5.2×10^19
Explanation
The charge of one electron is approximately 1.6×10^−19coulombs. Therefore, to have a total charge of one coulomb, we would need 1C/(1.6×10^−19C/electron) electrons, which equals 6.25×10^18 electrons.Incorrect options: (c) and (d) are incorrect because they represent values greater than (a), which is more than enough to make up one coulomb of charge.(b) This value is smaller than the correct answer and would represent less than one coulomb of charge.
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Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.
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