Question

A negative charge is placed at some point of the joining the two +Q charges at rest . The direction of motion of negative charge will depend upon the:

• A. Position of negative charge alone
• B. magnitude of negative charge alone
• C. both on the magnitude and positive of negative charge
• D. magnitude of positive charge

Answer 1

The correct option is C both on the magnitude and positive of negative charge

Force on charge particle due to another charge particle, $F=\frac{k{q}_1{q}_2}{d^2}$

Where, $d$ is separation

In this case,

here is 2 positive charges, that attract negativve charge, $F=\frac{k(-q)Q_1}{{d_1}^2}+\frac{k(-q)Q_2}{{d_2}^2}$

Hence, The direction of motion of negative charge will depend upon the both on the magnitude and positive of negative charge.