Two small spheres of masses 
and 
are suspended by weightless insulating threads of lengths 
and 
. The spheres carry charges 
and 
, respectively. The spheres are suspended such that they are in level with one another and the threads are inclined to the vertical at angles of 
and 
as shown. Which one of the following conditions is essential, if 
?
but 
Text Solution
Verified by ExpertsB
The three forces acting on each sphere are
(i) tension (ii) weight
(iii) electrostatic force of repulsion
For sphere 1 , in equilibrium, from figure,
and 
For sphere 2, in equilibrium, from figure,
and 
Force of repulsion between two charges are same.
Here, 
only, if 
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