Class 12 Physics: Electrostatics Unit 1 Short Answers

Electric Charge and Electric Field

• The SI unit of electric charge is the coulomb (C).

Electric Field of a Point Charge

• The magnitude of the electric field at a point due to a point charge is given by E = k * q / r^2, where E is the electric field, k is Coulomb's constant, q is the charge, and r is the distance from the point charge.

Superposition of Electric Fields

• The principle of superposition of electric fields states that when multiple charges are present, the total electric field at a point is the vector sum of the electric fields due to each charge.

Gauss's Law of Electrostatics

• Gauss's law of electrostatics states that the total electric flux through a closed surface is proportional to the charge enclosed within the surface, and is given by Φ = Q / ε₀, where Φ is the electric flux, Q is the total charge, and ε₀ is the electric constant.

Electric Potential

• The electric potential due to a point charge is given by V = k * q / r, where V is the electric potential, k is Coulomb's constant, q is the charge, and r is the distance from the point charge.

Test your knowledge of electrostatics with these short answer questions on electric charge, electric field, superposition, Gauss's law, and electric potential. Ideal for Class 12 physics students.