Units

Important Topics

Marks

Electrostatics

• Electric Charges and their conservation,

• Coulomb’s law

• Electric field

• Electric flux

• Electric potential, the potential difference

• Capacitors and capacitance

• Conductors and insulators

• Van de Graff generator

8

Current Electricity

• Electric current, the flow of electric charges in a metallic conductor

• Ohm’s law, electrical resistance

• Carbon resistors

• The internal resistance of a cell

• Kirchhoff’s laws and simple applications

• Potentiometer

8

Magnetic effect of current & Magnetism

• Concept of the magnetic field, Oersted’s experiment.

• Ampere’s law and its application

• Cyclotron.

• Force on a current-carrying conductor in a uniform magnetic field.

• Torque Experienced by a current loop in a uniform magnetic field.

• The magnetic dipole moment of a revolving electron.

• Torque on a magnetic dipole

• Electromagnets and factors affecting their strengths.

• Permanent magnets.

8

Electromagnetic Induction and Alternating current

• Electromagnetic induction; Faraday’s law, induced emf and current; Lenz’s law, Eddy currents.

• Self and mutual inductance.

• Alternating currents

• AC generator and transformer.

8

Electromagnetic Waves

• Need for displacement current.

• Electromagnetic waves

• Electromagnetic spectrum

3

Optics

• Reflection of light

• Refraction and dispersion of light through a prism.

• Scattering of light – blue colour of the sky and reddish appearance of the sun at sunrise and sunset.

• Interference, Young’s double hole experiment and expression for fringe width coherent sources and sustained interference of light.

12

Dual nature of Matter

• Photoelectric effect, Hertz and Lenard’s observations

• Einstein’s photoelectric equation- particle nature of light.

• Matter waves-wave nature of particles, de Broglie relation.

4

Atoms and Nuclei

• Alpha-particle scattering experiment

• Composition and size of nucleus, atomic masses, isotopes

• Mass-energy relation, mass defect; binding energy per nucleon and its variation with mass number; nuclear fission and fusion.

7

Electronic Devices

• Energy bands in solids (qualitative ideas only), conductors, insulators and Semiconductors

• Zener diode as a voltage regulator. Transistor as an amplifier (common emitter configuration) and oscillator.

7

Communication Systems

• Elements of a communication system (block diagram only)

• The bandwidth of signals (speech, TV and digital data)

• Production and detection of an amplitude-modulated wave.

5

Total

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