Question

Charges of +2 µC and +3 µC are 4 mm from each other. Raina’s group draws four diagrams trying to represent the electrical force between the charges.
Which diagram is correct?

A) W
B) X
C) Y
D) Z

Answer 1

The correct diagram would be A) W

Answer 2

Answer: The correct answer is option A.

Explanation:

When two like charges come closer to each other they will repel each other.

When two unlike charges come closer to each other they will attract.

$q_1=+2\mu C,q_2=+3\mu C$

Force on $q_1$ due to $q_2$:

$F_{12}=k\frac{q_1\times q_2}{r^2}$

Force on $q_2$ due to $q_3$:

$F_{21}=k\frac{q_2\times q_1}{r^2}$

$F_{12}=F_{21}$

Therefore, equal force is exerting on both the charges. The diagram drawn by Raina marked "W" is correct. Hence the correct option is (A).