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1.
A point charge of 40 stat coulomb is placed 
in front of an earthed metallic plane plate of large size. Then the force of attraction on the point charge is
in front of an earthed metallic plane plate of large size. Then the force of attraction on the point charge is
2.
Charge motion within the Gaussian surface gives changing physical quantity
3.
The radius of a metallic sphere if its capacitance is 
is
is
4.
Three capacitances of capacity 
and 
are connected in parallel. The total capacity will be
and are connected in parallel. The total capacity will be
5.
An uniform electric field 
exists along positive 
-axis. The work done in moving a charge 0.5 C through a distance 2 m along a direction making an angle 
with -axis is 10 J. Then the magnitude of electric field is
exists along positive -axis. The work done in moving a charge 0.5 C through a distance 2 m along a direction making an angle with -axis is 10 J. Then the magnitude of electric field is