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two charges 4q and -q are placed at a distance r apart.A chargeQ is placed exactly mid way betwwen them.what will be the value of Q so the charge 4q experience no net force

two charges 4q and -q are placed at a distance r apart.A chargeQ is placed exactly mid way betwwen them.what will be the value of Q so the charge 4q experience no net force

Grade:12

1 Answers

Abhay
13 Points
2 years ago
Q=q*(d^2/r^2) (where 'd' is distance b/w Q and 4q)
as force on 4q by -q and Q will be equal. 
If we use coulomb's law when Q is at 'd' distance from 4q then we get the above result.

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