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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?
6.
To form a composite 
capacitor from a supply of identical capacitors marked 
we require a minimum number of capacitors
capacitor from a supply of identical capacitors marked we require a minimum number of capacitors
7.
The unit of intensity of electric field is
8.
The electric field at a distance 
from the centre of a charged conducting spherical shell of radius 
The electric field at a distance 
from the centre of the sphere is
from the centre of a charged conducting spherical shell of radius The electric field at a distance from the centre of the sphere is
9.
If a slab of insulating material 
thick is introduced between the plates of a parallel plate capacitor, the separation between plates has to be increased by 
to restore the capacity to original value. The dielectric constant of the material will be
thick is introduced between the plates of a parallel plate capacitor, the separation between plates has to be increased by to restore the capacity to original value. The dielectric constant of the material will be
10.
Two small conducting spheres of equal radius have charges 
and 
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
and 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