Physics

Electrostatics

303 Questions

Electrostatics deals with electric charges, fields, and potentials at rest. It is a crucial topic for physics sections in engineering and civil services competitive examinations. Review these questions to build a strong understanding of Coulomb law, electric dipoles, Gauss law, and electric flux.

Electric field and potentialElectric dipole momentGauss Law applicationsCoulomb force calculationsCharge distribution on spheresEquipotential surfaces

Electrostatics Questions

Multiple choice

A solid conducting sphere of radius R has a charge Q. What is the electric field inside the sphere?

  1. E = 0

  2. E = kQ/R

  3. E = kQ/R^2

  4. E = kQ/R^3
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

The electric field inside a solid conducting sphere is given by E = kQ/r, where r is the distance from the center of the sphere.

Multiple choice

Gauss's Law is a fundamental law of electromagnetism. What is the significance of Gauss's Law?

  1. It relates the electric field to the charge distribution.

  2. It relates the magnetic field to the current distribution.

  3. It relates the electric field to the magnetic field.

  4. It relates the charge distribution to the current distribution.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Gauss's Law relates the electric field to the charge distribution. It states that the electric flux through any closed surface is proportional to the total charge enclosed by the surface.

Multiple choice

Gauss's Law is a powerful tool for solving electrostatics problems. What are some applications of Gauss's Law?

  1. Calculating the electric field of a charge distribution.

  2. Calculating the electric potential of a charge distribution.

  3. Calculating the capacitance of a capacitor.

  4. Calculating the inductance of a solenoid.
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

Gauss's Law can be used to calculate the electric field of a charge distribution, the electric potential of a charge distribution, the capacitance of a capacitor, and the inductance of a solenoid.