JEE Physics - MCQ Practice Questions

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:

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)?

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?