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CBSE Class 12-science Answered

pls explain how we got V=kq/r? reply fast plsss
Asked by | 17 Mar, 2013, 09:52: PM
answered-by-expert Expert Answer
Potential energy is defined as: Energy required to move a unit charge from a point in space to infinity. Since the coulumb force between two charges q and q'  is given as:
 
F = k q.q'/r2 since -dF/dr = V
thus V = kq/r
 
as q' = 1    a unit charge
Answered by | 18 Mar, 2013, 12:26: AM
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