A charge $\mathrm{Q}_{1}$ exerts some force on a second charge $\mathrm{Q}_{2}$. If a 3 rd charge $\mathrm{Q}_{3}$ is brought near, then the force of $\mathrm{Q}_{1}$ exerted on $\mathrm{Q}_{2}-$

• A

  will increase
• B

  will decrease
• Correct answer
  C

  will remain unchanged
• D

  will increase if $\mathrm{Q}_{3}$ is of the same sign as $\mathrm{Q}_{1}$ and will decrease if $\mathrm{Q}_{3}$ is of opposite sign.

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