Electrostatics

Question: Two small conducting spheres of equal radius have charges \[ + 10\mu C\] and \[ - 20\mu C\] respectively and placed at a distance \[R\] from each other experience force \[{F_1}\]. If they are brought in contact and separated to the same distance, they experience force \[{F_2}\]. The ratio of \[{F_1}\] to \[{F_2}\] is

1) 1 : 8

2) – 8 : 1

3) 1 : 2

4) – 2 : 1

Solution:

Explanation: 2e

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