Free Test Coulomb’s law – NEET

Q1: Coulomb’s law is applicable for which of the following?

A. Only point charges at rest B. Only moving charges C. Charges in all states D. Only neutral bodies

Q2: Two charges +q and -q are placed at a distance r. What is the nature of the force between them?

A. Attractive B. Repulsive C. Zero D. Oscillatory

Q3: Coulomb’s law gives the force between:

A. Two charged particles B. One charge and one dipole C. Two neutral bodies D. One magnet and one charge

Q4: If distance between two charges is halved, the force becomes:

A. Four times B. Double C. Half D. One-fourth

Q5: The value of Coulomb’s constant (k) in SI units is approximately:

A. 9 × 10^9 Nm^2/C^2 B. 9 × 10^6 Nm^2/C^2 C. 1.6 × 10^-19 Nm^2/C^2 D. 3 × 10^8 Nm^2/C^2

Q6: What happens to force if both charges are doubled?

A. Becomes four times B. Becomes double C. Becomes half D. Becomes one-fourth

Q7: What is the dimensional formula of Coulomb’s constant?

A. M¹L³T⁻⁴I⁻² B. M¹L²T⁻² C. ML⁻³T² D. M⁻¹L⁻²T⁴

Q8: In vacuum, the value of ε₀ is:

A. 8.85 × 10^-12 C²/Nm² B. 9.1 × 10^-31 kg C. 6.626 × 10^-34 Js D. 1.6 × 10^-19 C

Q9: Force between two charges in a medium of dielectric constant K becomes:

A. 1/K times B. K times C. K² times D. Independent of K

Q10: Which quantity affects the Coulomb’s force?

A. Magnitude of charges and distance between them B. Mass of charges C. Area of charge D. Charge’s speed

Q11: If the medium is changed from vacuum to water, force:

A. Decreases B. Increases C. Remains same D. Becomes zero

Q12: Coulomb’s law fails when:

A. Charges are moving very fast B. Charges are at rest C. Charges are identical D. Charges are opposite

Q13: Unit vector in Coulomb’s law denotes:

A. Direction of force B. Magnitude of force C. Charge value D. Distance only

Q14: Which of these is not a scalar?

A. Coulomb force B. Charge C. Potential D. Energy

Q15: Which law is analogous to Coulomb’s law?

A. Newton’s law of gravitation B. Ohm’s law C. Faraday’s law D. Ampere’s law

Q16: On doubling the distance between two charges, the force becomes:

A. One-fourth B. One-half C. Double D. Four times

Q17: What type of force is described by Coulomb’s law?

A. Non-contact force B. Contact force C. Frictional force D. Tension

Q18: If charge is tripled and distance is halved, force becomes:

A. 36 times B. 9 times C. 3 times D. 1/3 times

Q19: Which of these affects the value of Coulomb’s constant k?

A. Medium B. Charge C. Distance D. Mass

Quiz for Coulomb’s law