List of top Physics Questions on Electric Field

If potential (in volt) in a region is expressed as $ V(x, y, z) = 6xy - y + 2yz $, the electric field (in} $ \text{N/C} $ at point (1, 0, 1) is:

A long solenoid of length $75$ cm carries a current of $3.5$ A. If the number of turns of the solenoid is $600$, the magnitude of the magnetic field inside the solenoid is

If the relaxation time is doubled and the applied electric field is tripled, then the drift speed of electrons:

If $ E $ is the electric field intensity between the plates of a charged parallel plate capacitor, energy stored per unit volume in it is (permittivity of free space = $ \epsilon_0 $)

Graphical variation of electric field due to a uniformly charged insulating solid sphere of radius R, with distance r from the centre O is represented by

A dipole comprises of two charged particles of identical magnitude q and opposite in nature. The mass ‘m’ of the positive charged particle is half of the mass of the negative charged particle. The two charges are separated by a distance ‘l’. If the dipole is placed in a uniform electric field ‘$\overrightarrow{E}$; such a way that dipole axis makes a very small angle with the electric field, ‘$\overrightarrow{E}$'. The angular frequency of the oscillations of the dipole when released is given by.

Two charges each of magnitude 0.01 C and separated by a distance of 0.4 mm constitute an electric dipole. If the dipole is placed in an uniform electric field of 10 dyne/C making 30º angle with $\overrightarrow E$, the magnitude of torque acting on dipole is:

Given below are two statement: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : If an electric dipole of dipole moment 30 x 10-5 Cm is enclosed by a closed surface, the net flux coming out of the surface will by zero.
Reason R : Electric dipole consists of two equal and opposite charges.
In the light of above, statements, choose the correct answer from the options given below:

In a metallic conductor, under the effect of applied electric field, the free electrons of the conductor

An electric dipole of dipole moment is 6.0 x 10^-6 Cm placed in a uniform electric field of 1.5 x 10³ NC^-1 in such a way that dipole moment is along electric field. The work done in rotating dipole by 180º in this field will be _____mJ.

The electric field intensity due to an infinite thin plane sheet of surface charge density $\sigma$ is:

An infinite long wire is stretched horizontally 4 m above the surface of the earth. It has a charge of 1.0 micro-coulomb (µC) per cm of its length. The value of electric field at a point on earth vertically below the wire is

Electric field at a distance ‘r’ from an infinitely long uniformly charged straight conductor, having linear charge density λ is E₁. Another uniformly charged conductor having same linear charge density λ is bent into a semicircle of radius ‘r’. The electric field at its centre is E₂ . Then

Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion (A): All points inside a charged hollow spherical conducting sphere are at equal potential.
Reason (R) : The electric field inside a charged hollow spherical conducting sphere is non-zero.
In the light of the above statements, choose the correct answer from the options given below.

For a medium with permittivity (e) and permeability (µ), the speed of light (v) is given by:

The magnitude of electric field intensity $ E $ is such that, an electron placed in it would experience an electrical force equal to its weight. Then the value of $ E $ is:

Two capacitors of capacity 4 μF and 6 μF are connected in series to a 500 V battery. The potential difference across the 4 μF capacitor is:

The electric field $ \mathbf{E} $ in a region is given by $ \mathbf{E} = 3\hat{i} + 5\hat{j} $. The net electric flux through a square area of side 2 m parallel to y - z plane is

The end points of a uniform wire are joined to a cell of emf $ E $ and internal resistance $ r $. Starting from the midpoint of the wire and moving in the direction of the current, the potential $ V(x) $ is measured at every point till the midpoint is reached again. The plot that represents the potential $ V $ against distance $ x $ moved from mid point is

In the given circuit, if the current flowing through 5 $ \Omega $ resistor is 0.5 A, then the value of $ E $ is:

current flowing through 5 Ω resistor is 0.5 A

A block of mass $ m $ and charge $ q $ is connected to a point 'O' with an inextensible string. This system is on a horizontal table. An electric field $ E $ is applied perpendicular to the string and in the plane of the horizontal table. The tension in the string when it becomes parallel to the electric field is:

The electric potential at a point is given by $ V = \left(-5x + 3y + \sqrt{15z} \right) \, \text{volt}$.
The magnitude of the electric field at that point is

An electron and a proton having mass $ m_e $ and $ m_p $ respectively, initially at rest, move through the same distance $ s $ in a uniform electric field $ E $. If the time taken by them to cover that distance is $ t_e $ and $ t_p $ respectively, then $ \frac{t_e}{t_p} $ is equal to:

Electric field in a certain region is given by $ \vec{E} = \left( \frac{A}{x^2} \hat{i} + \frac{B}{y^3} \hat{j} \right) $. The SI unit of A and B are:

The following circuit contains diodes with forward bias having resistance $25Ω$, and reverse bias having infinite resistance. The ratio of $\frac{I_{1}}{I_{2}}$ is equal to