Electrostatics MCQs for CBSE Class 12 Physics (NCERT Based)
Electrostatics MCQs for CBSE Class 12 Physics
Class: CBSE Class 12
Subject: Physics
Section: Electrostatics
Topic: Electrostatics (NCERT Based)
Board: CBSE Board Examinations
Subject: Physics
Section: Electrostatics
Topic: Electrostatics (NCERT Based)
Board: CBSE Board Examinations
Instructions: These Multiple Choice Questions (MCQs) are designed strictly as per the NCERT syllabus, making them ideal for CBSE Class 12 Board Examination preparation.
Q1. SI unit of electric charge is:
Answer: B. Coulomb
Charge is measured in coulomb. One coulomb equals charge transported by 1 ampere current in 1 second.
Charge is measured in coulomb. One coulomb equals charge transported by 1 ampere current in 1 second.
Q2. Like charges:
Answer: B. Repel
According to electrostatic law, like charges repel and unlike charges attract.
According to electrostatic law, like charges repel and unlike charges attract.
Q3. Coulomb’s law force depends on:
Answer: D. All of these
Force ∝ q₁q₂ / r² and also depends on dielectric constant of medium.
Force ∝ q₁q₂ / r² and also depends on dielectric constant of medium.
Q4. Electric field is defined as force per:
Answer: A. Charge
E = F/q. It measures force experienced by unit positive charge.
E = F/q. It measures force experienced by unit positive charge.
Q5. Electric field lines originate from:
Answer: B. Positive charge
Field lines start from positive and end on negative charges.
Field lines start from positive and end on negative charges.
Q6. Unit of electric field:
Answer: A. N/C
Electric field = Force/Charge → Newton per Coulomb.
Electric field = Force/Charge → Newton per Coulomb.
Q7. Field inside conductor is:
Answer: A. Zero
Charges rearrange to cancel internal electric field.
Charges rearrange to cancel internal electric field.
Q8. Electric potential is work done per:
Answer: A. Charge
V = W/q.
V = W/q.
Q9. Unit of potential:
Answer: B. Volt
1 Volt = 1 Joule/Coulomb.
1 Volt = 1 Joule/Coulomb.
Q10. Equipotential surface has:
Answer: B. Same potential
No work is required along equipotential surface.
No work is required along equipotential surface.
Q11. Potential inside charged shell:
Answer: B. Constant
Electric field is zero but potential remains constant.
Electric field is zero but potential remains constant.
Q12. Capacitance depends on:
Answer: D. All
C = εA/d.
C = εA/d.
Q13. Unit of capacitance:
Answer: A. Farad
1 F = 1 C/V.
1 F = 1 C/V.
Q14. Dielectric increases:
Answer: B. Capacitance
Dielectric reduces field → increases capacitance.
Dielectric reduces field → increases capacitance.
Q15. Energy stored in capacitor:
Answer: B. ½CV²
Q16. Electric dipole moment unit:
Answer: A. C·m
Q17. Field at dipole center:
Answer: A. Zero
Q18. Gaussian surface is used to calculate:
Answer: D. All
Q19. Gauss law relates field with:
Answer: A. Charge enclosed
Q20. Parallel plate capacitor field:
Answer: A. Uniform
Field between plates remains constant ignoring edge effects.
Field between plates remains constant ignoring edge effects.
✔ End of Electrostatics MCQs – Keep Practicing for Board Exams!