List of practice Questions

Capacitors are used in electrical circuits where appliances need more

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

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

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

Each capacitor shown in figure is $ 2\mu F $ . Then the equivalent capacitance between A and B is

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 and potential inside hollow charged conducting sphere are respectively where $q$ and $r$ are the charge and radius of given sphere

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

In the arrangement of capacitors shown in figure, each capacitor is of $9 \,\mu F$, then the equivalent capacitance between the points $A$ and $B$ is