Maharashtra HSC Physics 2026 20 Most Important Questions for February 16 Exam Day

Chapters

Most Important Questions

Rotational Dynamics

1. Define moment of inertia. State its SI unit and dimensions.
2. State and prove the law of conservation of angular momentum.
3. Explain the physical significance of the radius of gyration.

Mechanical Properties of Fluids

1. Derive the relation between surface tension and surface energy per unit area.
2. Define the angle of contact. State its characteristics.
3. Define surface tension and surface energy.

Kinetic Theory of Gases and Radiation

1. State and explain the Stefan-Boltzmann law.
2. State Boyle’s law. Based on the kinetic theory, derive an expression for KE per unit volume.
3. Show that the RMS velocity of gas molecules is directly proportional to the square root of temperature.

Thermodynamics

1. State the first law of thermodynamics.
2. What is an isothermal process?
3. Draw a p-V diagram and explain positive-negative work.

Oscillations

1. What is the second pendulum? Derive a formula for its length.
2. Define SHM. Show variation of displacement, velocity, and acceleration with respect to time.
3. Write the differential equation of linear SHM.

Superposition of Waves

1. Show that all harmonics are present on a stretched string fixed at both ends.
2. State the principle of superposition of waves. Distinguish forced/resonance.

Wave Optics

1. State Brewster’s law and show that when light is incident at a polarizing angle, the reflected and refracted rays are perpendicular.
2. Draw a neat labelled diagram for the plane of vibration and the plane of polarisation.
3. With a neat diagram, explain the reflection of light on a plane reflecting surface.