AIIMS Physics Electric Charges And Fields Class 12 Questions

If two protons are moving with speed v = 4.5×10⁵ m/s parallel to each other then the ratio of electrostatic and magnetic force between them

Two parallel large thin metal sheets have equal surface charge densities ($\sigma = 26.4 \times 10^{-12} \text{ C/m}^2$) of same signs. The electric field between these sheet is

If the electric field is given by (5î + 4ĵ + 9k̂). The electric flux through a surface of area 20 units lying in the Y⁻Z plane will be

On distributing an electric dipole in stable equilibrium in an electric field, it returns back to its stable equilibrium orientation. The restoring torque brings it back to its stable equilibrium. Thus, both assertion and reason are true and reason is the correct explanation of the assertion.

An electron of mass Mₑ, initially at rest moves through a certain distance in a uniform electric field in time t₁. A proton of mass Mₚ also initially at rest, takes time t₂ to move through an equal distance in this uniform electric field, Neglecting the effect of gravity, the ratio t₂/t₁ is nearly equal to

A dipole of dipole moment 'p' is placed in non-uniform electric field along x-axis. Electric field is increasing at the rate of 1 V m⁻¹ then the force on dipole is

Electric field at a distance r from infinitely long conducting sheet is proportional to

Assertion: On going away from a point charge or a small electric dipole, electric field decreases at the same rate in both the cases. Reason: Electric field is inversely proportional to square of distance from the charge or on electric dipole.

Assertion: If a conductor is given charge then no excess inner charge appears. Reason: Electric field inside conductor is zero.

Assertion: Gaussian surface is considered carefully. Reason: The point where electric field to be calculated should be within the surface.

Identify incorrect for electric charge q

Electric field outside a long wire carrying charge q is proportional to

An electron projected with velocity v₀ = 2î in the electric field E = E₀ĵ. Trace the path followed by the electron

Assertion: Gauss's law shows diversion when inverse square law is not obeyed. Reason: Gauss's law is a consequence of conservation of charges.

Assertion : Gauss’s law can’t be used to calculate electric field near an electric dipole. Reason : Electric dipole don’t have symmetrical charge distribution.

In case of infinite long wire electric field is proportional to

Assertion : In a cavity within a conductor, the electric field is zero. Reason : Charges in a conductor reside only at its surface.

Two parallel large thin metal sheets have equal surface charge densities (\( \sigma = 26.4 \times 10^{-12} \) C/m²) of opposite signs. The electric field between these sheets is

The spatial distribution of the electric field due to two charges (A, B) is shown in figure. Which one of the following statements is correct?

Two infinitely long parallel conducting plates having surface charge densities +σ and -σ respectively, are separated by a small distance. The medium between the plates is vacuum. If ε₀ is the dielectric permittivity of vacuum, then the electric field in the region between the plates is:

Two concentric conducting thin spherical shells A and B having radii rₐ and r_b (r_b > rₐ) are charged to Qₐ and -Q_b (|Q_b| > |Qₐ|). The electrical field along a line, (passing through the centre) is

Four point +ve charges of same magnitude (Q) are placed at four corners of a rigid square frame as shown in figure. The plane of the frame is perpendicular to Z⁻axis. If a -ve point

The electric field due to a uniformly charged sphere of radius R as a function of the distance from its centre is represented graphically by

An electric dipole placed in a non-uniform electric field experiences

Three charges are placed at the vertices of an equilateral triangle of side a as shown in the given figure. The force experienced by the charge placed at the vertex A in a direction normal to BC is

Figure shown is a distribution of charges. The flux of electric field due to these charges through the surface S is

An electron having charge e and mass m is moving in a uniform electric field E. Its acceleration will be

Two spheres of same metal have radii a and b. They have been connected to a conducting wire. Find the ratio of the electric field intensity upon them.

Figure shows the electric lines of forces emerging from a charged body. If the electric field at A and B are Eₐ and Eᵦ respectively and if the displacement between A and B is r, then

A charge is placed at the centre of cube of side a then flux linked with one of its given faces will be

Let Eₐ be the electric field due to a dipole in its axial plane distant l and let Eₑ be the field in the equitorial plane distant l'. The relation between Eₐ and Eₑ is