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 uniformly charged ring of radius R carries total charge Q. What is the electric field at a point on the axis at distance x from the center?
Two identical conducting spheres carry charges +Q and -Q. When brought into contact, the charge on each sphere becomes:
A Gaussian surface encloses a net charge of 5 μC. The electric flux through the surface is:
An electric dipole of moment p is placed in a uniform electric field E at angle θ to the field. The potential energy is:
A non-conducting sphere of radius R is uniformly charged with charge density ρ. What is the electric field at distance r from center (r < R)?
The work done to move a charge q from point A (potential V_A) to point B (potential V_B) is:
A parallel plate capacitor is filled partially with dielectric (dielectric constant K, thickness d/2) and partially with air (thickness d/2). Its capacitance is:
An electron enters a uniform electric field of strength E with initial velocity perpendicular to the field. Its trajectory is:
A conducting plane carries uniform surface charge density σ. The electric field just outside the surface is:
Two capacitors C₁ and C₂ are connected in parallel across voltage V. The ratio of charges stored is:
An insulating rod of length L is uniformly charged with total charge Q. The electric potential at a point on the axis at distance x from one end is:
A point charge Q is placed at the center of a cubic Gaussian surface of side a. The electric flux through one face is:
An electric dipole (moment p) is placed in a non-uniform electric field. It experiences:
The electric field at distance r from an infinitely long uniformly charged line with linear charge density λ is:
What is the SI unit of electric dipole moment?
A capacitor is charged to potential V and then isolated. If the separation between plates is doubled, what happens to the potential difference?
Two identical metal spheres with charges +Q and -Q are brought in contact and then separated. What is the final charge on each sphere?
A point charge q creates an electric potential of 100 V at distance 2 m. What is the potential at distance 8 m from the same charge?
What is the relationship between electric field E and potential V?
A Gaussian surface encloses charges 2q, -q, and 3q. What is the total electric flux through the surface?