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CBSE Class 12-science Answered

If the distance between two equal points charges is doubled and their individual charges are also doubled,what would happen to the force between them?
Asked by bablukumarbablukumar255 | 17 Jun, 2019, 12:19: PM
answered-by-expert Expert Answer
Coulomb force F betweemn charges q1 and q2 when they are at a distance r apart is given by,
 
F  = begin mathsize 14px style K space fraction numerator q subscript 1 space q subscript 2 over denominator r squared end fraction end style.........................(1)
if charges are doubled and distance is also doubled, then changed force F' = begin mathsize 14px style K space fraction numerator 2 q subscript 1 space 2 q subscript 2 over denominator open parentheses 2 r close parentheses squared end fraction space equals space fraction numerator q subscript 1 space end subscript q subscript 2 over denominator r squared end fraction end style .....................(2)
Hence there is no change in magnitude of force
Answered by Thiyagarajan K | 17 Jun, 2019, 03:07: PM

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