Tamil Nadu Class 11 Physics Question Bank — Samacheer Kalvi Plus One

Unit 1 — Nature of Physical World and Measurement

One Mark

• Define physical quantity.
• What is a derived unit? Give one example.
• State Hooke's law.
• Define least count error.
• What is the dimensional formula of angular momentum?

Three Mark

• Explain the uses of dimensional analysis with examples.
• Differentiate between accuracy and precision.

Five Mark

• Explain error analysis. Define absolute error, mean absolute error, relative error, and percentage error. State rules for error propagation.

Unit 2 — Kinematics

One Mark

• Define velocity.
• What is the angle of projection for maximum range?
• Define relative velocity.
• State the condition for maximum height in projectile motion.
• What is instantaneous acceleration?

Three Mark

• Derive the expression for horizontal range of a projectile.
• Explain the concept of relative velocity with an example.

Five Mark

• Explain projectile motion. Derive expressions for time of flight, maximum height, and horizontal range. Show that the path is parabolic.

Unit 3 — Laws of Motion

One Mark

• State Newton's second law of motion.
• Define impulse.
• What is the angle of repose?
• Define centripetal force.
• What is inertia?

Three Mark

• Explain Newton's third law of motion. Why do action and reaction not cancel?
• Derive the expression for banking angle of a curved road.

Five Mark

• State and prove Newton's second and third laws of motion. Explain the application of Newton's laws to rocket propulsion.

Unit 4 — Work, Energy and Power

One Mark

• State the work-energy theorem.
• Define power.
• What is the unit of kinetic energy?
• What is a perfectly inelastic collision?
• Define conservative force.

Three Mark

• Derive the expression for elastic potential energy stored in a spring.
• Compare elastic and inelastic collisions.

Five Mark

• State the law of conservation of energy. Verify it for a freely falling body. Derive the work-energy theorem.

Unit 5 — Motion of System of Particles and Rigid Bodies

One Mark

• Define centre of mass.
• State the perpendicular axis theorem.
• What is the moment of inertia of a disc about its own axis?
• Define angular velocity.
• What is torque?

Three Mark

• State and prove the parallel axis theorem.
• Calculate the centre of mass of a system: 4 kg at origin and 2 kg at x = 3 m.

Five Mark

• Define moment of inertia. Derive the expression for moment of inertia of a uniform rod about an axis through its centre.

Unit 6 — Gravitation

One Mark

• State Newton's law of gravitation.
• What is gravitational potential?
• Define escape velocity.
• What is a geostationary satellite?
• State Kepler's second law.

Three Mark

• Explain variation of 'g' with altitude. Derive the expression.
• State and explain Kepler's three laws.

Five Mark

• Derive the expression for escape velocity. Compare with orbital velocity. Explain the concept of black holes qualitatively.

Unit 7 — Properties of Matter

One Mark

• Define stress.
• State Pascal's law.
• What is surface energy?
• Define viscosity.
• What is Archimedes' principle?

Three Mark

• Derive the excess pressure inside a soap bubble.
• Explain Stokes' law and terminal velocity.

Five Mark

• State and prove Bernoulli's theorem. Explain two applications.

Unit 8 — Heat and Thermodynamics

One Mark

• State the zeroth law of thermodynamics.
• What is an adiabatic process?
• Define entropy.
• State the second law of thermodynamics.
• What is the efficiency of a Carnot engine at 100% efficiency?

Three Mark

• Compare the four thermodynamic processes.
• Derive Mayer's relation Cₚ − Cᵥ = R.

Five Mark

• Describe the Carnot cycle. Derive its efficiency. Why is it the maximum possible efficiency?

Unit 9 — Kinetic Theory of Gases

One Mark

• State Boyle's law.
• What is the Boltzmann constant?
• Define mean free path.
• How many degrees of freedom does a monatomic gas have?
• What is the relation between pressure and kinetic energy?

Three Mark

• State the postulates of kinetic theory.
• Calculate the RMS speed of nitrogen at 300 K. (M = 28 g/mol, R = 8.314 J/mol K)

Five Mark

• Derive the expression for pressure of an ideal gas from kinetic theory. Hence derive PV = nRT.

Unit 10 — Oscillations

One Mark

• Define SHM.
• What is the time period of a spring of spring constant 400 N/m and mass 0.1 kg?
• At which position is KE maximum in SHM?
• Define amplitude.
• What is forced oscillation?

Three Mark

• Derive the expression for total energy in SHM. Show that it is constant.
• Show that motion of a spring-mass system is SHM. Derive time period.

Five Mark

• Define SHM. Write equations for displacement, velocity, and acceleration. Discuss energy variation with position and time. Sketch graphs.

Unit 11 — Waves

One Mark

• Define transverse wave.
• What is beat frequency?
• State the principle of superposition.
• What is a node?
• State the Doppler effect.

Three Mark

• Explain beats. Derive the expression for beat frequency.
• Derive the frequency of fundamental mode in an open organ pipe.

Five Mark

• Explain standing waves in a string. Derive frequencies of harmonics. Draw diagrams of first three modes.