CBSE Term- 2 Syllabus For Class 12th or XII or + 2.

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 TERM-II

		NO. OF PERIODS	MARKS
Unit -5	Electromagnetic Waves Chapter–8: Electromagnetic Waves	2	17
Unit-6	Optics Chapter–9: Ray Optics and Optical Instruments Chapter– 10: Wave Optics	18
Unit-7	Chapter–11: Dual Nature of Radiation and Matter	7	11
Unit-8	Atoms and Nuclei Chapter–12: Atoms Chapter–13: Nuclei	11
Unit-9	Electronic Devices Chapter–14: Semiconductor Electronics	7	7

 

Term-II Syllabus 2021-22 with deleted Part

CLASS-XII

SUBJECT-PHYSICS

Unit V: Electromagnetic waves 2 Periods Chapter–8: Electromagnetic Waves Electromagnetic waves, their characteristics, their Transverse nature (qualitative ideas only). Electromagnetic spectrum (radio waves, microwaves, infrared, visible, ultraviolet, X-rays, gamma rays) including elementary facts about their uses.   Unit VI: Optics 18 Periods Chapter–9: Ray Optics and Optical Instruments Ray Optics: - Refraction of light, total internal reflection and its applications, optical fibres, refraction at spherical surfaces, lenses, thin lens formula, lens maker’s formula, magnification, power of a lens, combination of thin lenses in contact, refraction of light through a prism. Optical instruments: Microscopes and astronomical telescopes (reflecting and refracting) and their magnifying powers.   Chapter–10: Wave Optics Wave optics: Wave front and Huygen's principle, reflection and refraction of plane wave at a plane surface using wave fronts. 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.

Chapter  8 Electromagnetic Waves Basic idea of displacement current,           Chapter 9 Ray Optics and Optical               Instruments Reflection of Light, spherical mirrors,                      mirror formula, Scattering of light blue colour of sky and reddish appearance of the sun at sunriseand Sunset. Chapter–10: Wave Optics  resolving power of microscope and astronomical telescope, polarisation, plane polarised Light, Brewster's law, uses of plane polarised light and Polaroids.

Unit VII: Dual Nature of Radiation and Matter 7 Periods   Chapter–11: 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. Experimental study of photoelectric effect Matter waves-wave nature of particles, de-Broglie relation Unit VIII: Atoms and Nuclei 11Periods Chapter–12: Atoms Alpha-particle scattering experiment; Rutherford's model of atom; Bohr model, energy levels, hydrogen spectrum.  Chapter–13: Nuclei Composition and size of nucleus, Nuclear force Mass-energy relation, mass defect, nuclear fission, nuclear fusion.

Chapter11                             Dual Nature of radiation and matter  Davisson-  Germer    experiment          Chapter-13 Nuclei Radioactivity, alpha, beta and gamma particles/rays and  their       properties; radioactive    decay            law, half-life and mean life, Binding    energy  per nucleon and its variation with mass number

Unit IX: Electronic Devices 7 Periods   Chapter–14: Semiconductor Electronics: Materials, Devices and Simple Circuits Energy bands in conductors, semiconductors and insulators (qualitative ideas only) Semiconductor diode - I-V Characteristics in forward and reverse bias, diode as a rectifier; Special purpose p-n junction diodes: LED, photodiode, solar cell.

Chapter-14 Semiconductor Electronics:                   Materials, Devices      and                Simple Circuits Zener diode and their characteristics, Zener diode     as      a               voltage regulator.

PRACTICAL DETAILS

Term II Total Periods: 16 Experiments assigned for Term-II 1.  To find the focal length of a convex lens by plotting graphs between u and v or between 1/u and1/v. 2.  To find the focal length of a convex mirror, using a convex lens. OR To find the focal length of a concave lens, using a convex lens. 3.  To determine angle of minimum deviation for a given prism by plotting a graph between angle of incidence and angle of deviation. 4.  To determine refractive index of a glass slab using a travelling microscope. 5.  To find refractive index of a liquid by using convex lens and plane mirror. 6.  To draw the I-V characteristic curve for a p-n junction diodein forward bias and reverse bias. Activities assigned for Term-II 1. To identify a diode, an LED, a resistor and a capacitor from a mixed collection of such items.

Experiments SECTION-B To find the value of v for different values of u in case of a concave mirror and tofind the focal length.

2.    Use of multimeter to see the unidirectional flow of current in case of a diode and an LED and check whether a given electronic component (e.g., diode) is in working order. 3.    To study effect of intensity of light (by varying distance of the source) on an LDR. 4.    To observe refraction and lateral deviation of a beam of light incident obliquely on a glass slab. 5.    To observe polarization of light using two Polaroids. 7.  To observe diffraction of light due to a thin slit. To studythe nature and size of the image formed by a (i) convex lens, (ii) concave mirror, on a screen by using a candle and a screen (for different distances of the candle from the lens/mirror). 8.  To obtain a lens combination with the specified focal length by using two lenses from the given set of lenses

To draw the characteristic curve of a Zener diode                      and to determine its reverse breaks down voltage.