List of top Physics Questions on Electrostatic potential asked in KEAM

Two positive charges of +Q each are placed at the corners A and B of an equilateral triangle ABC of side R. The net electric potential at C, in terms of K is (\(K = \frac{Q}{4\pi\epsilon_0 R}\))

$A$, $B$ and $C$ are three points in space forming an equilateral triangle of side $10$ cm. If a point charge $8\,\mu C$ is placed at $A$, then the work done in moving a unit charge from $B$ to $C$ is

The equipotential surface of a system of two point charge $5\,\mu C$ and $-5\,\mu C$ at points $A$ and $B$ separated by $80$ cm is a plane perpendicular to the line connecting $A$ and $B$ at

The distance between the centres of two identical solid spheres each of radius 5 cm kept in free space is 40 cm. If each one is holding a charge of $2,\mu C$, then the work done in bringing their centres to a separation of 30 cm is

If the potential difference between two points separated by a distance in a uniform electric field of 800 \(NC^{-1}\) is 16 V, then the distance of separation (in cm) is.

If the electric potential is given by $V = 3x^2 + 4x$ volt, then the magnitude of the electric field at the point $x = 1m$ is

If the work done in moving a charge of \( 3\,C \) from A to B is \( 12\,J \), then the potential difference between A and B is

A hollow sphere of radius 'r' encloses an electric dipole composed of two charges +q and -q. The net flux of electric field through the surface of the sphere due to the enclosed dipole is:

The ratio of the magnitudes of electrostatic force between two protons at a distarce r apart to that between two electrons at the same distance of separation is

The electric potential \(V\) at any point \((x,y,z)\) in space is given by \(V=4xz^2\) volt, where \(x,y,z\) are all in metre. The electric field at that point \((1\text{ m},0,2\text{ m})\) in \(\text{V m}^{-1}\) is

Four point charges (with equal magnitude of charge of \( 5 \text{ C} \); but with different signs) are placed at four corners of a square of side \( 10 \text{ m} \). Assuming the square is centered at the origin, the potential and the magnitude of electric field at the origin are:

A point dipole with dipole moment, \( \vec{p} = p_0 \hat{k} \), is kept at the origin. An external electric field given by, \( \vec{E} = E_0(2\hat{i} - 3\hat{j} + 4\hat{k}) \), is applied on it. Which one of the following statements is true?

A point charge $+Q$ is held at rest at a point $P$. Another point charge $-q$, whose mass is $m$, moves at a constant velocity $v$ in a circular orbit of radius $R_1$ around $P$. The work required to increase the radius of revolution of $-q$ from $R_1$ to another orbit $R_2$ is ($R_2 > R_1$)

Five equal point charges with charge $Q = 10$ nC are located at $x = 2, 4, 5, 10$ and $20$ m. If $\varepsilon_0 = \left[\dfrac{10^{-9}}{36\pi}\right]$ F/m, then the potential at the origin ($x = 0$) is

A conductor with a cavity is charged positively and its surface charge density is $\sigma$. If $E$ and $V$ represent electric field and potential, then inside the cavity

A charge \(Q\) is distributed over two concentric hollow spheres of radii \(a\) and \(b\) \((a>b)\), so that the surface charge densities are equal. The potential at the common centre is \(\frac{1}{4\pi \varepsilon_0}\) times

A point charge of 2 C experiences a constant force of 1000 N when moved between two points separated by a distance of 2 cm in a uniform electric field. The potential difference between the two points is

A point charge of 2 C experiences a constant force of 1000 N when moved between two points separated by a distance of 2 cm in a uniform electric field. The potential difference between the two points is

A point charge of 2 C experiences a constant force of 1000 N when moved between two points separated by a distance of 2 cm in a uniform electric field. The potential difference between the two points is

Two identical thin rings, each of radius $10\,cm$ carrying charges $10\,C$ and $5\,C$ are coaxially placed at a distance $10\,cm$ apart. The work done in moving a charge $q$ from the centre of the first ring to that of the second is

Two conducting spheres $A$ and $B$ of radius $a$ and $b$ respectively are at the same potential. The ratio of the surface charge densities of $A$ and $B$ is