Two charges $4\mathrm{q}$ and $\mathrm{q}$ are placed $\mathrm{30 }\mathrm{c}\mathrm{m}$ apart. At what point the value of the electric field will be zero?

• Correct answer
  A

  $10\mathrm{ }\mathrm{c}\mathrm{m}$ away from $\mathrm{q}$ and between the charges
• B

  $20\mathrm{ }\mathrm{c}\mathrm{m}$ away from $\mathrm{q}$ and between the charges
• C

  $10\mathrm{ }\mathrm{c}\mathrm{m}$ away from $\mathrm{q}$ and outside the line joining the charges
• D

  $10\mathrm{ }\mathrm{c}\mathrm{m}$ away from $4\mathrm{q}$ and outside the line joining them

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