Q213 / 225 · JEE Main 2002 · Physics

If a charge $q$ is placed at the centre of the line joining two equal charges $Q$ such that the system is in equilibrium then the value of $q$ is

A
$Q / 2$
B
$-Q / 2$
C
$\mathrm{Q} / 4$
Correct answer
D
$-Q / 4$

Solution

Apply the condition for equilibrium of each charge

Hence, the correct answer is option: 'D'.

Relevant Questions

A thin half ring of radius cm is uniformly charged with a total charge of coulomb. If the magnitude of the electric field at centre of the h06 Apr, 2026 (M)Electric Field and Electric Field Lines
A particle of charge and mass is projected from origin with an initial velocity . There exists a uniform magnetic field and a space varying 05 Apr, 2026 (E)Electric Field and Electric Field Lines
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A: In electrostatics, a condu04 Apr, 2026 (E)Electric Field and Electric Field Lines
Two metal plates are kept horizontally with separation of cm, with plate A on the top. An atomizer jet sprays oil (density g/cm ) droplets o02 Apr, 2026 (E)Electric Field and Electric Field Lines
Identify the correct statements : A. Electrostatic field lines form closed loops. B. The electric field lines point radially outward when ch28 Jan, 2026 (E)Electric Field and Electric Field Lines
Six point charges are kept apart from each other on the circumference of a circle of radius as shown in figure. The net electric field at th22 Jan, 2026 (M)Electric Field and Electric Field Lines