When a neutral body is rubbed and it becomes positively charged, it must have:
Correct answer: A. Lost electrons
- A. Lost electrons
- B. Lost protons
- C. Gained protons
- D. Gained electrons
Explanation
When a neutral body becomes positively charged, it means it has lost electrons. Electrons are negatively charged, so removing some from a neutral atom or molecule leaves it with a net positive charge due to the unchanged number of protons. Option A is correct because losing electrons results in a positive charge. Option B is incorrect because losing protons would change the element entirely and not just the charge. Option C is incorrect because gaining protons is not feasible in this context and would also change the element. Option D is incorrect because gaining electrons would make the body negatively charged, not positively.
This question appeared on the ETEA MDCAT 2012 paper, which you can sit online with every answer explained.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Coulomb's Law
Coulomb's law gives the electrostatic force between two point charges in terms of their magnitudes, separation and the medium between them. Questions involve attraction and repulsion, the inverse square relationship, superposition of forces and vector direction, which must not be confused with the electric field produced by a charge.
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 Coulomb's Law questions
The correct expression for the coulomb's force is:
The Coulomb's force between two point charges q1=1C and q2 is 2N. Where the distance between them is 3m, the charge q2 is:
The minimum charge on an object cannot be less than:
The Ratio of electro force between two protons to that between two electrons is of the order of:
When 1012 electrons are received from a neutral metal sphere. The charge on the sphere becomes:
The presence of a dielectric between two charged particles: