Two small spheres of equal size are 10 cm apart in air carry charges +1 micro C and -3 micro coulomb. Where should the thord charge be located so that no net electrostaticforce acts on it? (Ans - 24 cm from -3 micro C)





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  • 1
Fnet = F1+F2 
for Fnet=0 
F1=-F2

i.e 
q/x= 3q/(10-x)
on solving we get x= - 34cm i.e 10-x = -24 cm
  • 5
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