JEE Physics - MCQ Practice Questions

A point charge q is placed at distance r from an infinite grounded conducting plane. The force on the charge is:

The self-energy of a uniformly charged sphere of radius R and total charge Q is:

An electric dipole with dipole moment p is placed in uniform electric field E at angle θ to the field. The torque on dipole is:

Two identical conducting spheres carry charges Q₁ and Q₂. They are brought in contact and then separated. The final charge on each sphere is:

The electric field inside a uniformly charged spherical shell of radius R and charge Q at a distance r from center (r < R) is:

A charged particle moves from point A to point B in electrostatic field. The work done by electrostatic force is independent of path because:

A conducting sphere of radius R₁ inside a conducting spherical shell of radius R₂ (R₁ < R₂) has charge Q. The electric field for r > R₂ is:

The capacitance of a spherical conductor of radius R is:

If potential varies as V = 3x² + 4y in a region, the electric field at point (1,2) is:

The potential energy of electric dipole in uniform field E is:

A uniformly charged infinite plane sheet has surface charge density σ. What is the electric field at a distance d from the sheet?

Two point charges +8μC and -2μC are separated by 3 m. The electric potential is zero at a point on the line joining them, located at distance x from the +8μC charge. Find x:

A charged rod of length L with linear charge density λ is placed along the x-axis. The electric field at a point on the perpendicular bisector at distance y from the center is:

A parallel plate capacitor with plate separation d and area A is charged to voltage V. A dielectric of dielectric constant K is inserted between the plates. The change in stored energy is:

Two conducting spheres of radii r₁ and r₂ (r₁ > r₂) have charges Q₁ and Q₂. They are connected by a wire. The final charge distribution will be such that:

The electric field on the axis of a uniformly charged ring of radius a and total charge Q at distance x from the center is:

A point charge q is enclosed by a closed surface. If the surface is deformed without changing the charge enclosed, the electric flux through the surface:

An electron is projected horizontally with velocity v into a uniform electric field E pointing downward. Its trajectory is:

A uniformly charged sphere of radius R and total charge Q has its charge density reduced by half. The electric potential at the surface becomes:

Two identical metal spheres with charges +Q and -3Q are brought into contact and then separated by distance r. The electrostatic force between them is: