A CHARGE Q IS PLACED AT THE CENTRE OF THE LINE JOINING TWO EQUAL CHARGES Q. SHOW THAT THE SYSTEM OF THREE CHARGES WILL BE IN EQUILIBRIUM IF Q = -Q/4

Asked by Anurag Singh | 8th Jul, 2011, 02:47: AM

Expert Answer:

 
A charge q is placed at the centre C of the line joining two equal charges Q each, at points A and B. Let AB=2a
 
If the net force on each charge will be zero, the system will be in equilibrium.
Let us consider the charge Q at A. Under equilibrium, the total force on this charge is
 

Answered by  | 8th Jul, 2011, 02:25: AM

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