Two small conducting sphere of equal radius have charges +1µc and – 2µc respectively and placed at a distance d 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 ..........
Options:
(a) –8 : 1
(b) 1 : 2
(c) 1 : 8
(d) –2 : 1