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 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?
A charge distribution creates potential V(r) = kr² where k is constant. What is the electric field at distance r?
Two parallel conducting plates have surface charge density σ and -σ respectively. What is the electric field in the region between the plates?
A hollow conducting sphere of radius R has total charge Q. What is the surface charge density?
A parallel plate capacitor with plate area A and separation d is filled with dielectric constant κ. What is the capacitance?
Two point charges q₁ and q₂ are separated by distance r. If they are moved to distance 2r apart, how does the interaction energy change?
A charged particle of mass m and charge q is projected perpendicular to a uniform electric field E. What is the trajectory?
Three capacitors of capacitance 2 μF, 3 μF, and 6 μF are connected in series across a 12 V supply. What is the charge on the 2 μF capacitor?
A uniformly charged infinite line with linear charge density λ creates an electric field at perpendicular distance r. What is E?
A point charge +q is placed at the origin. What is the electric potential at a distance r from the charge?
An electric dipole of dipole moment p is placed in a uniform electric field E at an angle θ to the field. What is the torque acting on the dipole?