Electrostatics Questions

A, B and C are three points in a uniform electric field. The electric potential is :-...

A conducting sphere of radius R is given a charge Q. The electric potential and the electric field at the centre of the sphere respectively are

Two point charges of + 2 μC and + 6μC repel each other with a force of 12 N. If each is given an additional charge of - 4 μC, then force will become : -...

Two identical small spheres carry charge of Q1 and Q2 with Q1>>Q2. The charges are d distance apart. The force they exert on one another is F1. The spheres are made to touch one another and then...

Suppose the charge of a proton and an electron differ slightly. One of them is – e, the other is (e + ∆e). If the net of electrostatic force and gravitational force between two hydrogen atoms p...

Two identical charged spheres suspended from a common point by two massless strings of lengths 𝑙, areinitially at a distance d(d< < 𝑙) apart because of their mutual repulsion. The charges ...

Three concentric metal shells A, B and C of respective radii a, b and c (a < b < c) have surface charge densities +σ, -σ and +σrespectively. The potential of shell ...

An electron falls from rest through a vertical distance h in a uniform and vertically upward directed electric field E. The direction of electrical field is now reversed, keeping its magnitude the sam...

The electric field E is measured at a point P(0,0,d) generated due to various charge distributions and the dependence of E on d is found to be different for different charge distributions. List-I cont...

An elliptical cavity is carved within a perfect conductor. A positive charge q is placed at the centre of the cavity. The points A and B are on the cavity surface as shown in the figure. Then...

The figure shows an experimental plot fordischarging of a capacitor in an R-C circuit.The time constant of this circuit lies between:-...

Assume that an electric field exists in space. Then the potential difference VA - VO′ where VO is the potential at the origin and VA the potential at x = 2 m is...

Charges Q, 2Q and 4Q are uniformly distributed in three dielectric solid spheres 1, 2 and 3 of radii R/2, R and 2R respectively, as shown in figure. If magnitudes of the electric fields at point P at ...

A flat circular fixed disc has a charge +Q uniformly distributed on the disc. A charge +q is thrown with kinetic energy K, towards the disc along its axis. The charge q :...

Which of the following is true for the figure showing electric lines of force ? (E is electrical field, V is potential)...

Two charges, each equal to q, are kept at x = - a and x = a on the x-axis. A particle of mass m and charge is placed at the origin. If charge q0 is given a small displacement (y...

A uniformly charged thin spherical shell of radius R carries uniform surface charge density of σ per unit area. It is made of two hemispherical shells, held together by pressing them with force ...

In a region, the potential is represented by V(x, y, z) = 6x - 8xy - 8y + 6yz, where V is in volts and x, y, z are in metres. The electric force experienced by a charge of 2 coulomb situated at point ...

Two non-conducting spheres of radii R1 and R2 and carrying uniform volume charge densities +ρ and -ρ, respectively, are placed such that they partially overlap, as shown in the figure. At all ...

An electric dipole of moment ′p′ is placed in an electric field of intensity ′E′. The dipole acquires a position such that the axis of the dipole makes an angle θ with the...