JEE Physics - MCQ Practice Questions
Physics is where JEE ranks are usually won or lost, since a single conceptual slip changes the whole answer. Questions here span mechanics, rotational motion, thermodynamics, waves and oscillations, electrostatics, current electricity, magnetism, optics, and modern physics. Numerical problems carry full derivations so you can see which step you skipped, not just which option was right.
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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: