STANDARDPhysics-Electrostatics
STANDARD Physics Electric Forces MCQ Question
Type: MCQ-conceptual-Medium
A charge Q is placed at the centre of the line joining two point charges +q and +q as shown in figure. The ratio of charges Q and q is
A
4
B
1/4
C
−4
D
−1/4
Correct Answer
Option D
Detailed Explanation
For the system to be in equilibrium, the net force on q must be zero. Solving the equation Qq/(4πε₀x²) + qq/(4πε₀(2x)²) = 0 gives Q/q = −1/4.
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