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1.
Two point charges 
and 
are fixed on the 
-axis at positions 
and 
from origin respectively. At what positions on the axis, the resultant electric field is zero
and are fixed on the -axis at positions and from origin respectively. At what positions on the axis, the resultant electric field is zero
2.
A hollow sphere of charge does not produce an electric field at any
3.
Plates of area 
are arranged as shown. The distance between each plate is 
the net capacitance is
are arranged as shown. The distance between each plate is the net capacitance is
4.
Two point charges 
and 
are located at points 
and 
, respectively. The potential at a point 
where 
a is
and are located at points and , respectively. The potential at a point where a is
5.
A capacitor of capacitance 
is charged upto 
The energy stored in the capacitor is
is charged upto The energy stored in the capacitor is