CBSE EXAM 2018 :Getting through in CBSE Physics


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CBSE EXAM 2018 : Getting through in CBSE Physics 

CBSE Physics

For attention of Low Achievers:

Dear students,

This is not the time to look back at past but to resolve to make a fresh beginning. Here are some topics listed for you. This forms the MINIMUM LEVEL OF LEARNING.

You will find the videos & notes corresponding to these topics in this site which will help you build the desired concepts. You will do well to visit the same.

This will be followed by a number of useful articles to help boost your score & confidence in the exams.

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Get Started.

Click below to begin.

Minimum Level of learning (MLL)

Unit I: Electrostatics

Conservation of charge, Coulomb’s law, Electric field, Electric field due to a dipole,Torque on a dipole in uniform electric field.

Gauss theorem and its applications

Electric potential due to a a dipole and system of charges; equipotential surfaces.

Electric potential energy of a dipole in an electrostatic field.

Combination of capacitors in series and in parallel, Capacitance of a parallel plate capacitor with and without dielectric medium between the plates, Energy stored in a capacitor and Energy density.

Unit II: Current Electricity :

Drift velocity and its relation with electric current; Ohm’s law, V-I characteristics (linear and non-linear) Electrical energy and power
Carbon resistors, colour code for carbon resistors;
Combinations of resistors; Temperature dependence of resistance.

Combination of cells
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
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 on a moving charge in uniform magnetic and electric fields, Cyclotron.

Force on a current-carrying conductor in a uniform magnetic field, force between two parallel current carrying conductors-definition of ampere, Torque experienced by a current loop in uniform magnetic field; Moving coil galvanometer-its conversion to ammeter and voltmeter.

Current loop as a magnetic dipole,Magnetic dipole moment of a revolving electron, Torque on a magnetic dipole (bar magnet) in a uniform magnetic field.
Magnetic field lines; Earth’s magnetic field and magnetic elements. Para-, dia- and ferro – magnetic substances, with examples.
Unit IV: Electromagnetic Induction and Alternating Currents:
Faraday’s laws; Lenz’s Law, Eddy currents. Self and mutual induction.
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:
Need for displacement current, Characteristics of Electromagnetic waves & Transverse nature Electromagnetic spectrum & uses of EM Waves.

Unit VI: Optics :

Mirror formula, T otal internal reflection, optical fibers, Refraction at spherical surfaces,Thin lens formula, Lens maker’s formula, Combination of thin lenses in contact, Combination of a lens and a mirror, Refraction of light through a prism. Optical instruments, Scattering of light.

Huygen’s principle, Reflection and refraction of plane wave at a plane surface Proof of laws of reflection and refraction using Huygen’s 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. Resolving power Polarisation, Brewster’s law, Uses of polaroids.

Unit VII: Dual Nature of Matter and Radiation

Photoelectric effect, Hertz and Lenard’s observations; Einstein’s photoelectric equation.
Matter waves, de-Broglie relation, Davisson-Germer experiment.

Unit VIII: Atoms and Nuclei
Alpha-particle scattering experiment; Rutherford’s model of atom; Bohr model, energy levels, hydrogen spectrum.

Composition and size of nucleus, Radioactivity & Decay law. Mass-energy relation, Binding energy per nucleon and its variation with mass number.

Unit IX: Electronic Devices :

Energy bands in conductors, semiconductors and insulators.

Semiconductor diode – I-V characteristics in forward and reverse bias, diode as a rectifier; LED, photodiode, solar cell and Zener diode and their characteristics, Zener diode as a voltage regulator. Junction transistor, transistor action, characteristics of a transistor, transistor as a common emitter amplifier. Analog and digital singals, Logic gates (OR, AND, NOT, NAND and NOR).

Unit X: Communication Systems :

Elements of a communication system (block diagram only); bandwidth of signals (speech, TV and digital data); bandwidth of transmission medium. Propagation of electromagnetic waves in the atmosphere, sky and space wave propagation, satellite communication. Need for modulation, amplitude modulation and frequency modulation, advantages of frequency modulation over amplitude modulation.

CBSE EXAM 2018 : Getting through in CBSE Physics