List of top Physics Questions

Polar molecules have permanent dipole moment In polar molecule, the centres of positive and negative charges coincide even when there is no external field

The electric field inside a cavity is always zero Charges reside only on the outer surface of a conductor with cavity

The potential difference between the two conductors of a capacitor is small A capacitor is so configured that it confines the electric field lines within a small region of space

Work done in moving a charge between any two points in an electric field is independent of the path followed by the charge, between these points. Electrostatic force is a non conservative force.

Capacitors are used in electrical circuits where appliances need more

Consider a uniform electric field in the $z$-direction. The potential is a constant

Eight small drops, each of radius $r$ and having same charge $q$ are combined to form a big drop. The ratio between the potential of the bigger drop and the potential of the smaller drop is

Electric field due to an infinite sheet of charge having surface density $\sigma$ is E. Electric field due to an infinite conducting sheet of same surface density of charge is :

Electric field strength E due to a short dipole at a distance r from it are related as :

Electric potential $V$ due to a dipole is related to the distance $r$ of the observation point as :

Equipotential surfaces

Equipotentials at a great distance from a collection of charges whose total sum is not zero are approximately

Figure shows some equipotential lines distributed in space. A charged object is moved from point $A$ to point $B$

Five point charges each +q, are placed on five vertices of a regular hexagon of side L, The magnitude of the force on a point charge of value - q placed at the center of the hexagon (in newton) is

Gauss law helps in

How does the maximum $voltage\,(V)$ that can be given to a spherical conductor vary with its radius $R$ ?

If an electric dipole is placed in a uniform electric field, it experiences :

If an electric dipole of moment $\overrightarrow{p}$ is placed in electric field of strength $\overrightarrow{E}$ , then which of the following gives the potential energy of the dipole ?

If an electron enters into space between the plates of a parallel plate capacitor at an angle $\alpha$ with the plates and leaves at an angle $\beta$ to the plates .The ratio of its kinetic energy while entering the capacitor to that while leaving will be

If $E_o$ be the electric-field intensity due to a short dipole at a point on the axis and $E_r$, be that on the perpendicular bisector at the same distance from the dipole then

If the energy of a 100 $\mu$F capacitor charged to 6 kV could all be used to lift a 50 kg mass, what would be the greatest vertical height through which mass could be raised?

In a regular polygon of $n$ sides, each corner is at a distance $r$ from the centre. Identical charges are placed at $(n - 1)$ corners. At the centre, the magnitude of intensity is $E$ and the potential is $V$. The ratio $V/E$ is

In the question number $18$, the potential at a point $20\, cm$ from the mid-point of the line joining the two charges in a plane normal to the line and passing through the mid-point is

the charge on capacitors $C_{1}$ and $C_{4}$ are