Question

1. An object has a charge of 8e-19 C, and 10 electrons are removed from it. Which of the following statements is true?

A: The experiment is impossible, there aren't enough electrons to remove
B: At the end of the experiment, the object is positively charged

C: The final object is heavier

Answer 1

The correct answer should be option B.

Option A is rejected because there is no information about the number of electrons on the body. And usually any body has a large number of electrons present on it. So you can actually remove a large number of electrons from a body.

Option C is also wrong because instead of becoming heavy, the object should become lighter since the weight of 10 electrons is removed from it.

Option B is correct because the body is already positively charged with charge 8e-19 i.e it is already electron deficient by 50 electrons. Because the charge on 1 electron is approximately - (1.6e-19). After removing 10 electrons the body will still remain positively charged.

So, option B is correct