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12th Physics Unit 1 Important Questions 2026 - 27

12th Physics Unit 1 Important Questions for the 2026–27 academic year. This comprehensive guide covers all high-weightage topics—including Coulomb's Law, electric field lines, Gauss's Law, and capacitance—tailored strictly to the latest board exam patterns. Whether you are preparing for your class tests, midterms, or final revisions, practicing these essential short answers and long derivations will boost your confidence and help you score maximum marks. Bookmark this page for quick access to expert-verified solutions and downloadable PDF notes www.kalviimayam.com.

12th Physics Unit 1 Important 2 Mark Questions 

1. What is meant by quantisation of charges?

2. Define ‘electric dipole’

3. When two objects are rubbed with each other, approximately a charge of $50\text{ nC}$ can be produced in each object. Calculate the number of electrons that must be transferred to produce this charge.

4. Calculate the number of electrons in one coulomb of negative charge.

12th Physics Unit 1 Important 3 Mark Questions 

1. Derive an expression for electrostatic potential due to a point charge.

2. Obtain the expression for capacitance for a parallel plate capacitor

12th Physics Unit 1 Important 3 Mark Questions 

1. Derive the expression for resultant capacitance, when capacitors are connected in series and in parallel

2. Calculate the electric field due to a dipole on its equatorial plane

3. Calculate the electric field due to a dipole on its axial line

4. Obtain the expression for electric field due to an uniformly charged spherical shell.