Two point charges +q1 and +q2 are placed a finite distance ' d ' apart. It is desired to put a third charge q3 in between these two charges so that q3 is in equilibrium. This is

Question

Two point charges +q1 and +q2 are placed a finite distance ' d ' apart. It is desired to put a third charge q3 in between these two charges so that q3 is in equilibrium. This is (A) possible only if q3 is negative. (B) possible only if q3 is positive. (C) possible irrespective of the sign of q3. (D) not possible at all.

Tardigrade Admin · Accepted Answer

At null point vecE=0 ∴ any charge placed at that point will remain in equilibrium. <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/234cfd0aa25872e11d10e28b0e2543f4-.png" />

Q. Two point charges $+ q_{1}$ and $+ q_{2}$ are placed a finite distance ' $d$ ' apart. It is desired to put a third charge $q_{3}$ in between these two charges so that $q_{3}$ is in equilibrium. This is

possible only if $q_{3}$ is negative.

possible only if $q_{3}$ is positive.

possible irrespective of the sign of $q_{3}$ .

not possible at all.

At null point $E = 0$
$∴$ any charge placed at that point will remain in equilibrium.

Q. Two point charges +q1​ and +q2​ are placed a finite distance ' d ' apart. It is desired to put a third charge q3​ in between these two charges so that q3​ is in equilibrium. This is

possible only if q3​ is negative.

possible only if q3​ is positive.

possible irrespective of the sign of q3​.