Electrostatics Question 197

Question: Two small conducting spheres of equal radius have charges +10μC and 20μC respectively and placed at a distance R from each other experience force F1 . If they are brought in contact and separated to the same distance, they experience force F2 . The ratio of F1 to F2 is [MP PMT 2001]

Options:

A) 1 : 8

B) ? 8 : 1

C) 1 : 2

D) ? 2 : 1

Show Answer

Answer:

Correct Answer: B

Solution:

FQ1Q2

therefore F1F2=Q1Q2Q1Q2=10×205×5=81



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