By India Today Web Desk: The Central Board of Secondary Education, CBSE, is all set to begin the Class 10 and 12 board examination 2023. According to the datesheets, the CBSE Board Exam 2023 will begin on February 15, 2023. The class 12 Physics board exam is scheduled for March 6, 2023. Physics is a subject where many students get cold feet. For many, formula-based questions get overwhelming. As students are gearing up for the finals, a last-minute preparation guide can be necessary for students to align their preparation and revision strategy to score the best marks.
These last-minute tips can help you score high marks in the upcoming CBSE Class 12 Physic Board Exam 2023: Gallium Arsenide Phosphide
Chapter–1: Electric Charges and Fields
Main Points: Coulomb's law-force between point charges, electric field due to a point charge and electric dipole, torque and potential energy of a dipole in a uniform electric field, Gauss's theorem and its applications i.e line charge and shell
Chapter–2: Electrostatic Potential and Capacitance
Main Points: Electric potential due to a point charge, a dipole, equipotential surfaces, Potential energy, dielectrics, and electric polarization, Series and parallel capacitors, the capacitance of a parallel plate capacitor with and without dielectric medium, energy stored in a capacitor
Main Points: Drift velocity, mobility, and their relation with electric current; Ohm's law, V-I characteristics, electrical energy, and power, factors of resistance, Internal resistance, potential difference and emf of a cell, a combination of cells, Kirchhoff's rules, Wheatstone bridge.
Chapter–4: Moving Charges and Magnetism
Main Points: Biot - Savart law and its application to circular loops. Ampere's law and its applications to an infinitely long straight wire, solenoid, force on a moving charge, a current-carrying conductor in a uniform magnetic field and force between two parallel current-carrying conductors-definition of an ampere, torque on a current loop in, uniform magnetic field; magnetic dipole moment, moving coil galvanometer its current sensitivity and conversion to ammeter and voltmeter
Main Points: Bar magnet as an equivalent solenoid (qualitative treatment only), magnetic field intensity due to a magnetic dipole, torque on a magnetic dipole (bar magnet), magnetic properties of materials- Para-, dia- and ferromagnetic substances magnetic, the magnetization of materials, the effect of temperature on magnetic properties.
Main Points: Faraday's laws and induced EMF and current (methods of generation); Lenz's Law and finding of direction like the questions in NCERT, Self and mutual induction.
Main Points: Various values of alternating current/voltage; reactance and impedance; LCR series circuit (phasors only), resonance, power, power factor, and wattless current.
Main Points: displacement current, Electromagnetic spectrum including elementary facts about their uses and properties of electromagnetic waves
Chapter–9: Ray Optics and Optical Instruments
Main Points: Spherical mirror formula, total internal reflection, and optical fibers, refraction on spherical surfaces, lens formula, lens maker’s formula, magnification, the combination of thin lenses in contact, Prism, and formula. Microscopes and astronomical telescopes (reflecting and refracting) and their magnifying powers.
Main Points: Huygens’s principle, Proof of laws of reflection and refraction, Interference, Young's double slit experiment and expression for fringe width, Sustained interference of light, diffraction, and width of central maxima
â€‹â€‹â€‹â€‹â€‹â€‹â€‹Chapter–11: Dual Nature of Radiation and Matter
Main Points: Hertz and Lenard's observations; Einstein's photoelectric equation, Experimental study of photoelectric effect and graphs, de-Broglie relation
Main Points: Alpha-particle scattering experiment; Rutherford's model of the atom; Bohr model of hydrogen atom and derivation; spectral line spectra
Main Points: Nuclear force, mass defect; calculation and significance of binding energy per nucleon and graph between it and mass number, nuclear fission, nuclear fusion.
â€‹â€‹â€‹â€‹â€‹â€‹â€‹Chapter–14: Semiconductor Electronics: Materials, Devices, and Simple Circuits
Main Points: Energy bands, the difference between Intrinsic and extrinsic semiconductors, Junction diode - I-V characteristics, diode as a rectifier.
The article is authored by Mena Mittle, Vice Principal, Modern Public School, Shalimar Bagh.
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