1.
Two point charges +Q and +4Q are placed at a distance d. The point and the distance where the electric field becomes zero lies
2.
A charge of 4 μC is placed in an electric field of 5×10⁴ N/C. The force acting on it is
3.
Which statement about electric field lines is correct?
4.
If the charge enclosed by a closed Gaussian surface is doubled, the electric flux becomes
5.
At a point on the equatorial line of an electric dipole, the electric field is
6.
The electric field due to a uniformly charged infinite plane sheet is
7.
A hollow conducting sphere is positively charged. The electric field inside the hollow region is
8.
The unit of electric flux is
9.
The force between two charges becomes 16 times if
10.
A proton and an electron are placed in the same electric field. They experience
11.
The electric field at the centre of a uniformly charged semicircular arc is
12.
A dielectric inserted between two charges reduces the electrostatic force because
13.
The electric field at a point is 3×10⁵ N/C. The force on a 2 μC charge is
14.
Which physical quantity remains unchanged when a charge moves in a uniform electric field?
15.
According to Coulomb's law, electrostatic force is
16.
If three identical positive charges are placed at the corners of an equilateral triangle, the net electric field at the centroid is
17.
The SI unit of dipole moment is
18.
Electric field is maximum
19.
The electric field due to a point charge decreases as
20.
Gauss's law is most useful for calculating electric field of
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