JEE Physics - MCQ Practice Questions

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:

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?

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:

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:

A charge q₁ = +2 μC is at position (0, 0) and charge q₂ = -3 μC is at position (4, 0) in meters. What is the electric potential at point (4, 3)?

A capacitor is charged to potential V and then isolated. If the separation between plates is doubled, what happens to the potential difference?

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?

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 conducting sphere of radius a is charged to potential V₀. What is the surface charge density on the sphere?