Question

Two objects placed at some finite distance
repel each other, then
1)Both must be positively charged
2)Both must be negatively charged
3)Both may be uncharged
4)Both may be negatively charged

Answer 1

Answer:

second option is a correct answer

Explanation:

both both must be negatively charged

Answer 2

Two objects placed at some finite distance  repel each other, then:

(4) Both may be negatively charged.

- Two objects will repel each other if both the objects are either positively charged or both are negatively charged.

- Option (1) and (2) give an exact confirmation regarding the presence of only one type of charge.

- Since they rule out the possibility of other type of charge, hence both of these are incorrect.

- Uncharged objects do not repel each other at all, so 3rd option is incorrect.

- Option (4) gives a possibility that both the objects may be negatively charged.

- Since it also gives the possibility of positive charge.

- Hence, it is the correct answer.