JEE Physics - MCQ Practice Questions

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

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

A charged rod of length L with linear charge density λ is placed along the x-axis. The electric field at a point on the perpendicular bisector at distance y from the center is:

Two point charges Q and -Q are at distance 2d apart. The potential difference between two points on the perpendicular bisector at distances x and 2x from the midpoint is proportional to:

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 uniformly charged infinite line with linear charge density λ creates an electric field at perpendicular distance r. What is E?

Three point charges are arranged at the vertices of an equilateral triangle of side a. If charges are +q, +q, and -2q, what is the net electric potential at the centroid?

A charge Q is uniformly distributed on a ring of radius R. What is the electric potential at a point on the axis at distance x from the center?

Consider a uniformly charged disc of radius R with total charge Q. What is the electric field at the center of the disc?

Two point charges q₁ = 2 μC and q₂ = -2 μC are separated by 1 cm. What is the magnitude of electric field at the midpoint between them?

A spherical conductor of radius R is grounded and placed near an isolated point charge +Q at distance d from its center (d > R). Which statement is correct about the induced charge on the sphere?