List of top Physics Questions

An electron carrying charge $-e$ is located at $O$ and another charge $q$ is located at $P$. The electron is moved from $O$ to $Q$ such that $OPQ$ is an equilateral triangle. The work done in doing so is

An infinite number of charges each of magnitude q are placed-on x - axis :at distances of 1,2, 4, 8, ... meter from the origin. The intensity of the electric field at origin is

Capacity of parallel plate condenser remains unaffected on introducing a insulating slab between the plates Electric field intensity between the plates increases on introducing the insulating slab

Dielectric polarisation means formation of positive and negative charges inside the dielectric. Free electrons are formed in this process

In a series combination of capacitors, charge on each capacitor is same In such a combination, voltage across each capacitor is same

Increasing the charge on the plates of a capacitor means increasing the capacitance Capacitance is directly proportional to charge

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