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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An electric dipole experiences maximum torque when placed in a uniform electric field at angle θ with respect to the field. The value of θ is:
The electric field intensity at distance r from a line charge with linear charge density λ is given by:
A parallel plate capacitor has capacitance C and is charged to voltage V. If voltage is doubled and a dielectric K is inserted, the energy stored becomes:
A test charge q is moved from point A to point B in an electric field. The work done by the field is 100 J. If the same charge is moved from B to A, the work done is:
A uniformly charged infinite plane sheet has surface charge density σ. What is the electric field at a distance from the sheet?
A metallic sphere of radius R is charged such that surface charge density is σ. If the sphere is surrounded by a dielectric medium of dielectric constant K, how does the electric field just outside the surface change?
Two fixed point charges Q₁ = +2μC and Q₂ = -2μC are separated by 2 m. A test charge +1μC is moved along the perpendicular bisector. At what distance from the midpoint (on the bisector) is the electric field maximum?
A parallel plate capacitor is filled with two dielectrics of thickness d/2 each and dielectric constants K₁ and K₂. What is the equivalent capacitance if the original capacitance (empty) was C₀?
An electric dipole with dipole moment p is placed in a non-uniform electric field. Which statement is correct?
A hollow conducting sphere of radius R carries charge Q. A point charge q is placed at the center. What is the electric field at distance r from center (r > R)?
The potential at distance r from a point charge Q is V. If the distance is doubled, the new potential is:
A charged particle enters a uniform electric field perpendicularly. Its path is:
What is the capacitance of an isolated conducting sphere of radius R in vacuum?
The energy stored in a capacitor of capacitance C charged to potential V is:
Two point charges Q and -Q are at distance 2d apart. The potential difference between two points on the perpendicular bisector at distances x and 2x from the midpoint is proportional to:
A conductor of arbitrary shape carries charge Q. Which is constant throughout the conductor?
The electric field just outside a conductor surface is perpendicular to the surface. This is because:
A parallel plate capacitor has plate area A, separation d, and dielectric constant K. Its capacitance is:
Three capacitors of capacitance C each are connected in a combination where two are in parallel and this combination is in series with the third. The equivalent capacitance is:
A point charge is brought from infinity to a point in an electric field. Work done depends on: