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1.
Two small conducting sphere of equal radius have charges +10 
C and -20C respectively and placed at a distance 
from each other experience force 
If they are brought in contact and separated to the same distance, they experience force 
the ratio of 
to
is
C and -20C respectively and placed at a distance from each other experience force If they are brought in contact and separated to the same distance, they experience force the ratio of to is
2.
An electric dipole is kept in non-uniform electric field. It experiences
3.
A parallel plate condenser is filled with two dielectrics as shown. Area of each plate is 
and the separation is 
The dielectric constants are 
and 
respectively. Its capacitance in farad will be
and the separation is The dielectric constants are and respectively. Its capacitance in farad will be
4.
Under the action of a given coulombic force the acceleration of an electron is 
Then the magnitude of acceleration of a proton under the action of same force is nearly
Then the magnitude of acceleration of a proton under the action of same force is nearly
5.
An object 
has a charge of 
and the object 
has a charge of 
. Which statement is true?
has a charge of and the object has a charge of . Which statement is true?