DOWNLOAD SYLLABUS : syllabus_12.pdf
Recommended Textbooks.1. Physics Part-I, Textbook for Class XI, Published by NCERT
2 . Physics Part-II, Textbook for Class XI, Published by NCERT
Class XII (Theory)
One Paper Time: 3 Hours 70 Marks
Unit I Electrostatics 08
Unit II Current Electricity 07
Unit III Magnetic effect of current & Magnetism 08
Unit IV Electromagnetic Induction and Alternating current 08
Unit V Electromagnetic Waves 03
Unit VI Optics 14
Unit VII Dual Nature of Matter 04
Unit VIII Atoms and Nuclei 06
Unit IX Electronic Devices 07
Unit X Communication Systems 05
Total 70
Unit I: Electrostatics (Periods 25)
Electric Charges; Conservation of charge, Coulomb’s law-force between two point charges, forces
between multiple charges; superposition principle and continuous charge distribution.
Electric field, electric field lines, electric field due to a point charge; electric dipole, electric field
due to a dipole at axial and equitorial position; torque on a dipole in uniform electric field.
Electric flux, statement of Gauss’s theorem and its applications to find field due to infinitely long
straight wire, uniformly charged infinite plane sheet and uniformly charged thin spherical shell
(field inside and outside).
Electric potential, potential difference, electric potential due to a point charge, a dipole and
system of charges; equipotential surfaces, electrical potential energy of a system of two point
charges and of electric dipole in an electrostatic field.
Conductors and insulators, free charges and bound charges inside a conductor. Dielectrics and
electric polarisation, capacitors and capacitance, combination of capacitors in series and in
parallel, capacitance of a parallel plate capacitor with dielectric medium between the plates,
energy stored in a capacitor. Van de Graaff generator.
Unit II: Current Electricity (Periods 22)
Electric current, flow of electric charges in a metallic conductor, drift velocity, mobility and their
relation with electric current; Ohm’s law, electrical resistance, V-I characteristics (linear and
non-linear), electrical energy and power, electrical resistivity and conductivity. Carbon resistors,
colour code for carbon resistors; series and parallel combinations of resistors; effect of temperature
on resistance.
emf and potential difference of a cell, internal resistance of a cell, combination of cells in series
and in parallel.
Kirchhoff’s laws and simple applications. Wheatstone bridge, metre bridge.
Potentiometer - principle and its applications to measure potential difference and for comparing
emf of two cells; measurement of internal resistance of a cell.
Unit III: Magnetic Effects of Current and Magnetism (Periods 25)
Concept of magnetic field, Oersted’s experiment.
Biot - Savart law and its application to current carrying circular loop.
Ampere’s law and its applications to infinitely long straight wire. Straight and toroidal solenoids,
force between two parallel current-carrying conductors-definition of ampere.
Force on a current-carrying conductor in a uniform magnetic field. Torque experienced by a
current loop in uniform magnetic field; moving coil galvanometer-its current sensitivity and
conversion to ammeter and voltmeter.
Force on a moving charge in uniform magnetic and electric fields. Cyclotron.
Current loop as a magnetic dipole and its magnetic dipole moment. Magnetic dipole moment of a
revolving electron. Magnetic field intensity due to a magnetic dipole (bar magnet) along its axis and
perpendicular to its axis. Torque on a magnetic dipole (bar magnet) in a uniform magnetic field; bar
magnet as an equivalent solenoid, magnetic field lines; Earth’s magnetic field and magnetic elements.
Para-, dia- and ferro - magnetic substances, with examples. Electromagnets and factors affecting
their strengths. Permanent magnets.
Unit IV: Electromagnetic Induction and Alternating Currents (Periods 20)
Electromagnetic induction; Faraday’s law, induced emf and current; Lenz’s Law, Eddy currents.
Self and mutual inductance, displacement current.
Alternating currents, peak and rms value of alternating current/voltage; reactance and impedance;
LC oscillations (qualitative treatment only), LCR series circuit, resonance; power in AC circuits,
wattless current.
AC generator and transformer.
Unit V: Electromagnetic waves (Periods 4)
Displacement current, Electromagnetic waves and their characteristics (qualitative ideas only).
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