Two small conducting spheres of equal radius have charges

Asked by admin @ 20/08/2021 in Physics viewed by 488 People

1. 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:

(a) 1 : 8
(b) -8 : 1
(c) 1 : 2
(d) -2 : 1

Answered by admin @ 20/08/2021

F 1 = 9×10^9 200×10^-6%R^2 and F 2 = -9×10^9 × 10^-6% R^2 now divide F1 and F2 then you will get 4 the option ; CONCEPT behind it is when two charges are attached then they will get same charge as -20+10= -10 C

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