Question

Two point charges q₁ = +2 N.C and q₂= -3N.C are separated in air. Where is the neutral point?

Answer 1

Explanation & Answer

• Place a positive unity test charge in between those two charges and think.
• At the neutral point, there won't be a net force acting on the test charge meaning that the forces caused on it by the two charges are equal and opposite.
• Since the two charges are different in magnitude the neutral point should lie next to the low charge outside the in-between space.

$\qquad\qquad \begin{aligned} \small NP..............&+2...............................................................-3\\ &or\\ \small -3..................&.............................................+2.................NP \end{aligned}$