# Physics Class 11 NCERT with explanation videos and examples

## An overview of the topics to be covered for Physics in class 11 NEET

UNIT I: DIVERSITY IN LIVING WORLD

• Physics: Scope and excitement; nature of physical laws; Physics, technology and society.

• Need for measurement: Units of measurement; systems of units; SI units, fundamental and derived units. Length, mass and time measurements; accuracy and precision of measuring instruments; errors in measurement; significant figures.

• Dimensions of physical quantities, dimensional analysis and its applications.

UNIT II: KINEMATICS

• Frame of reference, Motion in a straight line; Position-time graph, speed and velocity. Uniform and non-uniform motion, average speed and instantaneous velocity. Uniformly accelerated motion, velocity-time and position-time graphs, for uniformly accelerated motion (graphical treatment).

• Elementary concepts of differentiation and integration for describing motion. Scalar and vector quantities: Position and displacement vectors, general vectors, general vectors and notation, equality of vectors, multiplication of vectors by a real number; addition and subtraction of vectors. Relative velocity.

• Unit vectors. Resolution of a vector in a plane-rectangular components.

• Scalar and Vector products of Vectors. Motion in a plane. Cases of uniform velocity and uniform acceleration- projectile motion. Uniform circular motion.

UNIT III: LAWS OF MOTION

• Intuitive concept of force. Inertia, Newton‟s first law of motion; momentum and Newton‟s second law of motion; impulse; Newton‟s third law of motion. Law of conservation of linear momentum and its applications.

• Equilibrium of concurrent forces.Static and Kinetic friction, laws of friction, rolling friction, lubrication.

• Dynamics of uniform circular motion. Centripetal force, examples of circular motion (vehicle on level circular road, vehicle on banked road).

UNIT IV: WORK, ENERGY, AND POWER

• Work done by a constant force and variable force; kinetic energy, work-energy theorem, power.

• Notion of potential energy, potential energy of a spring, conservative forces; conservation of mechanical energy (kinetic and potential energies); non-conservative forces; motion in a vertical circle, elastic and inelastic collisions in one and two dimensions.

UNIT V: MOTION OF SYSTEM OF PARTICLES AND RIGID BODY

• Centre of mass of a two-particle system, momentum conservation and centre of mass motion. Centre of mass of a rigid body; centre of mass of uniform rod.

• Moment of a force,-torque, angular momentum, conservation of angular momentum with some examples.

• Equilibrium of rigid bodies, rigid body rotation and equation of rotational motion, comparison of linear and rotational motions; moment of inertia, radius of gyration. Values of M.I. for simple geometrical objects (no derivation). Statement of parallel and perpendicular axes theorems and their applications.

UNIT VI: GRAVITATION

• Kepler‟s laws of planetary motion. The universal law of gravitation. Acceleration due to gravity and its variation with altitude and depth.

• Gravitational potential energy; gravitational potential. Escape velocity, orbital velocity of a satellite. Geostationary satellites.

UNIT VII: PROPERTIES OF BULK MATTER

• Elastic behaviour, Stress-strain relationship. Hooke‟s law, Young‟s modulus, bulk modulus, shear, modulus of rigidity, poisson‟s ratio; elastic energy.

• Viscosity, Stokes‟ law, terminal velocity, Reynold‟s number, streamline and turbulent flow. Critical velocity, Bernoulli‟s theorem and its applications.

• Surface energy and surface tension, angle of contact, excess of pressure, application of surface tension ideas to drops, bubbles and capillary rise.

• Heat, temperature, thermal expansion; thermal expansion of solids, liquids, and gases. Anomalous expansion. Specific heat capacity: Cp, Cv- calorimetry; change of state – latent heat.

• Heat transfer- conduction and thermal conductivity, convection and radiation. Qualitative ideas of Black Body Radiation, Wein‟s displacement law, and Green House effect.

• Newton‟s law of cooling and Stefan‟s law.

UNIT VIII: THERMODYNAMICS

• Thermal equilibrium and definition of temperature (zeroth law of Thermodynamics). Heat, work and internal energy. First law of thermodynamics. Isothermal and adiabatic processes.

• Second law of the thermodynamics: Reversible and irreversible processes. Heat engines and refrigerators.

UNIT IX: Behaviour of Perfect Gas and Kinetic Theory

• Equation of state of a perfect gas, work done on compressing a gas.

• Kinetic theory of gases: Assumptions, concept of pressure. Kinetic energy and temperature; degrees of freedom, law of equipartition of energy (statement only) and application to specific heat capacities of gases; concept of mean free path.

UNIT X: OSCILLATIONS AND WAVES

• Periodic motion-period, frequency, displacement as a function of time. Periodic functions. Simple harmonic motion(SHM) and its equation; phase; oscillations of a spring-restoring force and force constant; energy in SHM –Kinetic and potential energies; simple pendulum-derivation of expression for its time period; free, forced and damped oscillations (qualitative ideas only), resonance.

• Wave motion. Longitudinal and transverse waves, speed of wave motion. Displacement relation for a progressive wave. Principle of superposition of waves, the reflection of waves, standing waves in strings and organ pipes, fundamental mode and harmonics. Beats. Doppler effect.