Quiz for Electrostatics

Q1: What is the SI unit of electric charge?

A. Coulomb B. Farad C. Newton D. Ohm

Q2: What is the force between two 1 C charges placed 1 m apart in vacuum?

A. 9 × 10^9 N B. 1 N C. 0 N D. 9 × 10^3 N

Q3: Which law governs the electrostatic force between two point charges?

A. Ohm’s Law B. Coulomb’s Law C. Faraday’s Law D. Gauss’s Law

Q4: What happens when two like charges are brought close?

A. They attract B. They repel C. They merge D. No effect

Q5: Electric field lines start from?

A. Negative charge B. Positive charge C. Neutral point D. Earth

Q6: What is the nature of the electric field inside a conductor in electrostatic equilibrium?

A. Uniform B. Zero C. Infinite D. Oscillating

Q7: Work done in moving a charge in an equipotential surface is?

A. Zero B. Maximum C. Minimum D. Infinite

Q8: What is the electric flux through a closed surface enclosing charge q?

A. q/ε₀ B. qε₀ C. q²/ε₀ D. ε₀/q

Q9: Unit of electric field?

A. V B. N/C C. C/N D. F

Q10: Electric potential due to a point charge at infinity is?

A. Zero B. Infinite C. 1V D. Depends on charge

Q11: The direction of electric field is taken from?

A. Positive to negative B. Negative to positive C. North to South D. South to North

Q12: Two charges +q and -q are placed at a distance d. What is their electric dipole moment?

A. 0 B. q/d C. qd D. -qd

Q13: Electric potential energy of two like charges is?

A. Zero B. Positive C. Negative D. Undefined

Q14: The capacitance of a capacitor increases when?

A. Dielectric constant increases B. Plate area decreases C. Distance increases D. Dielectric constant decreases

Q15: If charge is doubled and distance halved, the force becomes?

A. 16 times B. 4 times C. Double D. Same

Q16: Which of the following is not a vector?

A. Electric field B. Force C. Potential D. Acceleration

Q17: A point charge placed inside a conductor?

A. Moves freely B. Is at rest C. Creates current D. Vanishes

Q18: Which device stores electric charge?

A. Resistor B. Inductor C. Capacitor D. Transformer

Q19: Electric field at the surface of a charged conductor is?

A. Zero B. Uniform and perpendicular C. Infinite D. Tangential

Q20: Potential difference is defined as?

A. Work per unit mass B. Work per unit charge C. Force per unit charge D. Charge per unit work