JEE Physics - MCQ Practice Questions

Two point charges of +2 μC and -2 μC are placed 10 cm apart. What is the electric field at a point midway between them?

The electric potential due to a point charge is V = kq/r. If the charge is doubled and distance is halved, the potential becomes:

A conducting sphere of radius 10 cm carries a charge of 5 μC. The electric field at a distance of 5 cm from the center inside the conductor is:

A parallel plate capacitor has plates of area A separated by distance d. If a dielectric of constant K is inserted between the plates, the capacitance becomes:

Three identical charges q are placed at the vertices of an equilateral triangle of side a. The electric potential at the centroid is:

A uniformly charged infinite plane sheet has surface charge density σ. The electric field due to the sheet is:

A charged soap bubble of radius R has surface charge density σ. The excess pressure inside the bubble due to electrostatic force is:

Two concentric spheres have radii r₁ (inner) and r₂ (outer). The inner sphere has charge +Q and outer sphere has charge -Q. The electric field in the region r₁ < r < r₂ is:

A parallel plate capacitor is charged to voltage V and then isolated. If the plate separation is doubled, the energy stored becomes:

The electric flux through a closed surface enclosing a net charge of 10 μC is:

A point charge q is placed at distance r from an infinite grounded conducting plane. The force on the charge is:

The self-energy of a uniformly charged sphere of radius R and total charge Q is:

An electric dipole with dipole moment p is placed in uniform electric field E at angle θ to the field. The torque on dipole is:

Two identical conducting spheres carry charges Q₁ and Q₂. They are brought in contact and then separated. The final charge on each sphere is:

The electric field inside a uniformly charged spherical shell of radius R and charge Q at a distance r from center (r < R) is:

A charged particle moves from point A to point B in electrostatic field. The work done by electrostatic force is independent of path because:

A conducting sphere of radius R₁ inside a conducting spherical shell of radius R₂ (R₁ < R₂) has charge Q. The electric field for r > R₂ is:

The capacitance of a spherical conductor of radius R is:

If potential varies as V = 3x² + 4y in a region, the electric field at point (1,2) is:

The potential energy of electric dipole in uniform field E is: