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Updated on : 2022-09-05

Solution

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Correct option is A)

**Hint: **Use formula of force on the particle by dipole

**Explanation: Step 1: Formula used: **Force on particle by dipole is given by the formula:

$F=qE$

$∴$ Electric filed due to dipole on axial condition is given by:

$E=r_{3}K2P $

$F=r_{3}Kq2P $

$F∝r_{3}1 $

Step 2: Conclusion:

So, force is proportional to the cube of distance inversely.

If the distance is doubled, then force will be $81 $ time of the original force.

**Answer:**

Hence, option A is the correct answer.

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