1.
An electric dipole placed in non-uniform electric field experiences
2.
The net electric field at equatorial position at distance r from the centre of a dipole varies
3.
The electric field due to an infinite line charge at distance r is
4.
Indentify the incorrect option
5.
Two static and point charges – 2q and +q are situated at the origin and at the point (2a, 0 ,0) respectively. The point along x-axis where the electric field zero, is
6.
Charges q, -q, q and -q are placed at the corners A, B, C and D of a square.The direction of electric field at the centre of the square is along:
7.
Three identical point charges +q, -q and -q, are placed at the vertices of A, B and C of an equilateral triangle ABC of each side r. What is the direction of net electric field at the centre O of this triangle?
8.
What is the electric flux passes through a surface of area 100 m² lying in the y-z plane,if vector E = (i ̂+ 2j ̂+ 3k ̂ ) N/C ?
9.
A point charge q is placed at the centre of the semicircle.The flux of the electric field passing through this surface is:
10.
Two spherical conductors A and B having radii r and 2r and carying equal charges q are brought in contact and then separated. What are charges on each sphere after separation?
11.
Two point charges + 16 e and + 4e are at distance r apart. At what distance, a charge q must be placed from charge +4e so that it is in equilibrium?
12.
A dipole of point charges, q and -q are fixed at points (0, a) and (0, -a) on the y-axis. The magnitude of net dipole moment
13.
A dipole (-q and +q) is placed on y-axis at position (0, -a) and (0, a). The direction of net electric field at equatorial position is
14.
A dipole of moment p makes an angle 30⁰ with the electric field E. The torque acting on it will be
15.
Three point charges, each equal to -q are placed at the vertices of an equilateral triangle. A third charge Q is placed at the centre of the centre. Find the value of Q for all four charges are in equilibrium.
16.
Two point charges -q and +q are placed at a distance r apart. A third charge Q is so placed that all three charges are in equilibrium. Then the value of third charge Q will be
17.
Two infinite plane sheet M and N are parallel to each other and separated by some distance apart. The surface charge densities on A and B are +σ and -σ respectively. What is the electric field outside plate M?
18.
What is the direction of net electric field at the centre of a dipole?
19.
A dielectric of constant k is completely filled between two point charges. The force acting between them
20.
Four point charges q, q, -q and -q are placed at four corners of a square of each side 'a'. Find the net dipole moment of the system.
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