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.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Electrostatics
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.
Practise Electrostatics
831 free Electrostatics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Electrostatics questions
The unit of electric field is not equivalent to
When a solid body is negatively charged by friction, it means that the body has
A point charge Q is placed at the mid-point of a line joining two charges, 4 q and q. if the net force on charges q is 0, then Q must be equal to
If a charge is moved against the Coulomb force of an electric field
Two point charges +2 coulomb and +6 coulomb repel each other with a force of 12 N. If a charge of -2 coulombs is given to each of these charges, the force will now be
A hollow sphere of copper is positively charged. Then the electric field inside the sphere is