Assam Higher Secondary Physics study guide
Assam Higher Secondary Physics · Work through your exam, one topic at a time.
The Assam Higher Secondary Physics examination is the Physics paper of the H.S. Final Examination, the Class XII school-leaving examination for higher secondary students in Assam. The Assam Higher Secondary Physics study guide has 14 sections and about 4,478 words.
01Electrostatics: Charge, Field, Potential and Capacitors
Electrostatics links charge, field and potential with Gauss's law and capacitors. Numericals usually combine Coulomb's law with superposition, or ask for capacitance, stored energy and the effect of a dielectric.
320 words, about 2 min02Current Electricity: Resistance, Circuits and Cells
Current electricity tests Ohm's law, resistivity and drift speed, Kirchhoff's rules, the Wheatstone bridge and potentiometer, and cells with internal resistance. R = ρL/A; resistivity rises with temperature for metals and falls for semiconductors.
311 words, about 2 min03Magnetic Effects of Current and Magnetism
This domain covers the Biot–Savart and Ampère results, force on moving charges and on current-carrying wires, torque on a current loop, the moving-coil galvanometer, and the magnetic properties of matter. Long straight wire B = μ₀I/2πr; centre of a coil B = μ₀NI/2R; solenoid B = μ₀nI, where n is turns per metre and μ₀ = 4π×10⁻⁷ T m A⁻¹.
330 words, about 2 min04Electromagnetic Induction and Alternating Currents
This domain pairs Faraday–Lenz induction and self/mutual inductance with AC circuits: phasors, impedance, resonance, power factor and transformers. ε = −N dΦ/dt, with Φ = BA cosθ.
362 words, about 2 min05Electromagnetic Waves and Optics
This domain joins Maxwell's electromagnetic waves - production, speed, spectrum order - with ray and wave optics: mirrors, lenses, total internal reflection, interference, diffraction and polarisation. c = 1/√(μ₀ε₀) = 3×10⁸ m/s; E₀/B₀ = c; E, B and the propagation direction are mutually perpendicular; no medium is required.
295 words, about 1 min06Dual Nature of Matter
Dual nature tests the photoelectric effect, Einstein's photoelectric equation, stopping potential and the de Broglie wavelength - the evidence that light and matter each show both wave and particle behaviour. Photon energy E = hν = hc/λ; the shortcut hc ≈ 1240 eV nm saves time.
305 words, about 2 min07Atoms and Nuclei
Bohr radii and energy levels, spectral series, and nuclear physics: mass defect and binding energy, radioactive decay law, half-life and activity, fission and fusion. Bohr model: angular momentum is nh/2π; r n = 0.529 n²/Z Å; E n = −13.6 Z²/n² eV; hydrogen ionisation energy is 13.6 eV.
320 words, about 2 min08Electronic Devices
Semiconductor physics: energy bands, doping, the p–n junction and diode characteristics, rectification, zener regulation, photodiodes, LEDs, solar cells, transistors and logic gates. Intrinsic semiconductors have equal electron and hole densities.
345 words, about 2 min09Physical World, Units, Measurement and Kinematics
Base units and dimensions, error propagation, significant figures, vernier and screw gauge readings, then straight-line and projectile kinematics with graph interpretation. Seven SI base units: metre, kilogram, second, ampere, kelvin, mole, candela.
301 words, about 2 min10Laws of Motion
Newton's three laws, impulse and momentum conservation, friction on level and inclined surfaces, circular motion and banking, and simple pulley and contact problems. First law defines inertia; second law F net = ma = dp/dt; third-law pairs act on different bodies and never cancel on a single body.
339 words, about 2 min11Work, Energy and Power
Work done by constant and variable forces, the work–energy theorem, conservative versus non-conservative forces, power, and elastic and inelastic collisions. W = Fd cosθ: zero when force is perpendicular to displacement, negative when it opposes motion.
318 words, about 2 min12Rotational Motion and Gravitation
Moment of inertia and its theorems, torque and angular momentum, rolling motion, and gravitation: variation of g, orbital and escape speeds, Kepler's laws. I = Σmr²; ring about its axis MR², disc MR²/2, solid sphere 2MR²/5, rod about its centre ML²/12.
337 words, about 2 min13Properties of Bulk Matter and Thermodynamics
Elasticity, fluid statics and dynamics, surface tension and viscosity, thermal expansion and calorimetry, heat transfer, and the first and second laws with Carnot efficiency. Stress = F/A; strain is dimensionless; Young's modulus Y = (F/A)/(ΔL/L), valid within the elastic limit.
279 words, about 1 min14Oscillations and Waves
Simple harmonic motion, spring–mass and pendulum periods, energy in SHM, and wave behaviour: speed, superposition, standing waves, organ pipes, beats and the Doppler effect. SHM: a = −ω²x and x = A sin(ωt + φ); v = ω√(A² − x²) is maximum at the mean position; acceleration is maximum at the extremes where v = 0.
316 words, about 2 min