What is the distance between the two sph

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Target Exam

CUET

Subject

Physics

Chapter

Electric Charges and Fields

Question:

Case : Read the passage and answer the following question(s).

The electrostatic force on a small sphere of charge 0.4 µC due to another small sphere of charge –0.8 µC in air is 0.2 N.

What is the distance between the two spheres?

Options:

12 cm

3.2 N

6 cm

26 cm

Correct Answer:

12 cm

Explanation:

F = kq₁q₂/r²

r² = kq₁q₂/F

F = 0.2 N ; q₁= 0.4 µC ; q₂= – 0.8 µC

r = 12 cm