NEET Physics Video Lectures For class 12

Chapter Name

Topics

Electrostatics

Electric Charges & Fields

Electrostatic Potential & Capacitance

• Electric charges: Conservation of charge. Coulomb's law forces between two-point charges, forces between multiple charges: superposition principle and continuous charge distribution.
• Electric field: Electric field due to a point charge, Electric field lines. Electric dipole, Electric field due to a dipole. Torque on a dipole in a uniform electric field.
• Electric flux' Gauss's law and its applications to find fields due to infinitely long uniformly charged straight wire, uniformly charged infinite plane sheet, and uniformly charged thin spherical shell. Electric potential and its calculation for a point charge, electric dipole and system of charges; potential difference, Equipotential surfaces, Electrical potential energy of a system of two-point charges and of electric dipole in an electrostatic field.
• Conductors and Insulators. Dielectrics and electric polarization, capacitors and capacitances, the combination of capacitors in series and parallel, capacitance of a parallel plate capacitor with and without dielectric medium between the plates. Energy stored in a capacitor.

Current Electricity

• Electric current. Drift velocity, mobility and their relation with electric current. Ohm’s law. Electrical resistance. V-l characteristics of Ohmic and non-ohmic conductors.
• Electrical energy and power' Electrical resistivity and conductivity. Series and parallel combinations of resistors; Temperature dependence of resistance.
• Internal resistance, potential difference and emf of a cell, a combination of cells in series and parallel. Kirchhoff’s laws and their applications. Wheatstone bridge. Metre Bridge.

Magnetic Effects Of Current and Magnetism

Magnetism and Matter

• Biot - Savart law and its application to the current carrying circular loop. Ampere’s law and its applications to infinitely long current carrying straight wire and solenoid. Force on a moving charge in uniform magnetic and electric fields.
• Force on a current-carrying conductor in a uniform magnetic field. The force between two parallel currents carrying conductors-definition of ampere.
• Torque experienced by a current loop in a uniform magnetic field: Moving coil galvanometer, its sensitivity, and conversion to ammeter and voltmeter.
• Current loop as a magnetic dipole and its magnetic dipole moment. Bar magnet as an equivalent solenoid. magnetic field lines; Magnetic field due to a magnetic dipole (bar magnet) among its axis and perpendicular to its axis.
• Torque on a magnetic dipole in a uniform magnetic field. Paramagnetic, diamagnetic and ferromagnetic substances with examples, effect of temperature on magnetic properties.

Electromagnetic Induction

Alternating Current

• Electromagnetic induction: Faraday's law. Induced emf and current: Lenz’s Law, Eddy currents. Self and mutual inductance.
• Alternating currents, peak and RMS value of alternating current/voltage: reactance and impedance: LCR series circuit, resonance: power in AC circuits, Wattless current. AC generator and transformer.

Electromagnetic Waves

• Displacement current. Electromagnetic waves and their characteristics, Transverse nature of electromagnetic waves, Electromagnetic spectrum (radio waves, microwaves, infrared, visible, ultraviolet. X-rays. Gamma rays), Applications of EM waves.

Ray Optics

Wave Optics

• Reflection of light, spherical minors, mirror formula. Refraction of right at plane and spherical surfaces, thin lens formula and lens maker formula. Total internal reflection and its applications.
• Magnification, Power of a Lens. Combination of thin lenses in contact. Refraction of light through a prism. Microscope and Astronomical Telescope (reflecting and refracting) and their magnifying powers.
• Wave optics: wave front and Huygens' principle. Laws of reflection and refraction using Huygens principle. Interference, Young's double-slit experiment and expression for fringe width, coherent sources, and sustained interference of light. Diffraction due to a single slit, width of central maximum. Polarization, plane-polarized light: Brewster's law, uses of plane-polarized light and Polaroid.

Dual Nature of Matter and Radiation

• Dual nature of radiation. Photoelectric effect. Hertz and Lenard's observations; Einstein's photoelectric equation: particle nature of light.
• Matter waves - wave nature of particle, de Broglie relation.

Atoms

Nuclei

• Alpha-particle scattering experiment; Rutherford's model of atom; Bohr model, energy levels hydrogen spectrum. Composition and size of nucleus, atomic masses
• Mass-energy relation, mass defect; binding energy per nucleon and its variation with mass number, nuclear fission, and fusion.

Electronic Devices

• Semiconductors; semiconductor diode: I-V characteristics in forward and reverse bias; diode as a rectifier; I-V characteristics of LED. the photodiode, solar cell, and Zener diode; Zener diode as a voltage regulator.
• Logic gates (OR. AND. NOT. NAND and NOR).

Experimental Skills

• Familiarity with the basic approach and observations of the experiments and activities:
• Vernier calipers - its use to measure the internal and external diameter and depth of a vessel.
• Screw gauge-its use to determine thickness V diameter of thin sheet/wire.
• Simple pendulum-dissipation of energy by plotting a graph between the square of amplitude and time.
• Metre Scale - the mass of a given object by the principle of moments.
• Young's modulus of elasticity of the material of a metallic wire.
• Surface tension of water by capillary rise and effect of detergents.
• Coefficient of Viscosity of a given viscous liquid by measuring terminal velocity of a given spherical body.
• Speed of sound in air at room temperature using a resonance tube.
• Specific heat capacity of a given (i) solid and (ii) liquid by method of mixtures.
• The resistivity of the material of a given wire using a meter bridge.
• The resistance of a given wire using Ohm's law.
• Resistance and figure of merit of a galvanometer by half deflection method.
• The focal length of;

1. Convex mirror
2. Concave mirror, and
3. Convex lens, using the parallax method.

• The plot of the angle of deviation vs angle of incidence for a triangular prism.
• Refractive index of a glass slab using a traveling microscope.
• Characteristic curves of a p-n junction diode in forward and reverse bias.
• Characteristic curves of a Zener diode and finding reverse breakdown voltage.
• Identification of Diode. LED, Resistor. A capacitor from a mixed collection of such item