SATHEE: Physics 12

Physics 12 Physics 12

UNIT I: ELECTROSTATICS

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 field due to infnitely 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

UNIT II: CURRENT ELECTRICITY

Electric current, Drift velocity

mobility and their relation with electric current. Ohm’s law

Electrical resistance

V-I 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

Kirchhoffs raws and their applications

wheatstone bridge. Metre Bridge

UNIT III: MAGNETIC EFFECTS OF CURRENT AND MAGNETISM

Biot - Savart law and its application to current carrying circular loop

Ampere’s law

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

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) along its axis and perpendicular to its axis

Torque on a magnetic dipole in a uniform magnetic field

para- , dia and ferromagnetic substances with examples

Effect of temperature on magnetic properties

UNIT IV: ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENTS

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

transformer

UNIT V: 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 e.m. waves

UNIT VI: OPTICS

Reflection of light

spherical mirrors

mirror formula

Refraction of light at plane and spherical surfaces

thin lens formula

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: wavefront and Huygens’ principle

Laws of reflection and refraction using Huygens principle

Interference, Young’s double-slit experiment and expression for fringe width

coherent sources

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

UNIT VII: DUAL NATURE OF RADIATION AND MATTER

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

UNIT VIII: ATOMS AND NUCLEI

Alpha-particle scattering experiment

Rutherford’s model of atom

Bohr model

energy level’s 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

fusion

UNIT IX: 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

Junction transistor

transistor action

Characteristics of transistor

transistor as an amplifier (CE configuration)

basic idea of analog and digital signals

Logic gates (OR. AND. NOT. NAND and NOR)

Engineering Preparation

Mathematics 11th

Mathematics 12th

JEE Previous Year Questions

JEE Tutorial Sessions

Medical Preparation

NEET Previous Year Questions

NEET Tutorial Sessions

NCERT Books & Solutions

NCERT Books for JEE

NCERT Books for NEET

NCERT Solutions for JEE

NCERT Solutions for NEET

NCERT Exemplar for JEE

NCERT Exemplar for NEET

Important Resources

Physics Formulas

Chemistry Formulas

Mathematics Formulas

Other Resources

Student Help Booklet

SPOC Help Booklet

Syllabus

Mentorship

Mentorship for JEE

Mentorship for NEET

NCERT Exemplar Video Solutions

NCERT Exercise Video Solution

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