Kerala Plus Two Physics (DHSE) study guide
Kerala Plus Two Physics (DHSE) · Work through your exam, one topic at a time.
The Kerala Higher Secondary Certificate (HSC) Physics examination is the Class 12 physics paper set by the Directorate of Higher Secondary Education (DHSE), Kerala, and taken by students completing the science stream of the state higher secondary course. It is a school-leaving and higher-education entrance qualification: results feed into university and professional-course admissions, so the mark matters beyond mere promotion. The Kerala Plus Two Physics (DHSE) study guide has 14 sections and about 3,834 words.
01Electrostatics: Fields, Potentials, Gauss's Theorem and Capacitors
Electrostatics opens the DHSE Plus Two course and carries heavy weight in the board paper: Coulomb's law, electric field and potential, dipoles, Gauss's theorem, conductors and capacitors. Questions usually pair a definition with a sign-sensitive calculation.
326 words, about 2 min02Current Electricity: Drift, Resistance, Kirchhoff and the Potentiometer
Current Electricity tests how charge flow is modelled microscopically (drift velocity, mobility, relaxation time) and how circuits are solved using Kirchhoff's rules, the Wheatstone bridge, the metre bridge and the potentiometer. I = nAev(d); current density J = I/A = nev(d) = σE; resistivity ρ = m/(ne²τ) and conductivity σ = 1/ρ.
298 words, about 1 min03Magnetic Effects of Current and Magnetism
This domain joins moving charges to magnetic fields: Biot–Savart law, Ampere's circuital law, force on conductors, the cyclotron, the moving-coil galvanometer and the magnetic properties of matter. Biot–Savart: dB = (μ₀/4π)(I dl × r̂)/r².
261 words, about 1 min04Electromagnetic Induction and Alternating Currents
Electromagnetic Induction and Alternating Currents links changing flux to emf, then develops AC circuit analysis: rms and peak values, phasors, series LCR resonance, power factor and transformers. Faraday's law: ε = −dΦ/dt; for N turns ε = −N dΦ/dt.
294 words, about 1 min05Electromagnetic Waves and Optics
This domain covers Maxwell's displacement current, the electromagnetic spectrum, and ray and wave optics through interference, diffraction and polarisation. Displacement current I(d) = ε₀ dΦ(E)/dt restores continuity of current while a capacitor charges.
269 words, about 1 min06Dual Nature of Matter and Radiation
The Dual Nature of Matter and Radiation tests the photon picture, the photoelectric effect and matter waves, with numerical work on stopping potential, threshold frequency and de Broglie wavelength. Photon energy E = hν = hc/λ; the handy value is hc = 1240 eV nm.
257 words, about 1 min07Atoms and Nuclei
Atoms and Nuclei runs from Rutherford's scattering to Bohr's model and spectral series, then to nuclear size, binding energy, radioactivity and fission or fusion. Rutherford: most alpha particles pass almost undeflected while a few rebound, so the nucleus is tiny and positive.
264 words, about 1 min08Semiconductor Devices and Communication Systems
Semiconductor Devices and Communication Systems covers band theory, doping, the p-n junction, rectifiers, Zener regulation, transistors, logic gates, and the elements of modulation and communication. Band gaps separate conductors (~0 eV), semiconductors (~1 eV) and insulators (above about 3 eV).
282 words, about 1 min09Physical World, Units, Measurements and Kinematics
This domain covers the SI system, dimensions, errors and instruments, then straight-line motion, projectiles and relative velocity - the toolkit every later mechanics chapter relies on. Seven SI base units: metre, kilogram, second, ampere, kelvin, mole, candela.
266 words, about 1 min10Laws of Motion
Laws of Motion turns Newton's three laws into problem-solving: free-body diagrams, friction, circular motion and momentum conservation. First law defines inertia; second law F = dp/dt = ma for constant mass; third-law pairs act on different bodies, so they never cancel on one body.
263 words, about 1 min11Work, Energy and Power
Work, Energy and Power tests the work–energy theorem, conservative versus non-conservative forces, potential energy, collisions and power ratings. W = F·s = Fs cosθ; work is zero when the force is perpendicular to the displacement.
268 words, about 1 min12Gravitation
Gravitation covers Newton's inverse-square law, variation of g, Kepler's laws, orbital and escape speeds, and the energy of satellites. F = Gm₁m₂/r², with G = 6.67×10⁻¹¹ N m² kg⁻².
258 words, about 1 min13Properties of Bulk Matter and Thermodynamics
This large domain covers elasticity, fluid mechanics, thermal expansion and calorimetry, heat transfer, kinetic theory and the laws of thermodynamics including Carnot efficiency. Stress = force/area, strain = fractional change, and Young's modulus Y = stress/strain in the linear region; energy density = ½ × stress × strain.
276 words, about 1 min14Oscillations and Waves
Oscillations and Waves covers simple harmonic motion, energy in SHM, pendulums and springs, then superposition, standing waves in strings and pipes, beats and the Doppler effect. SHM: x = A sin(ωt + φ), v = ω√(A² − x²), a = −ω²x, and ω = 2π/T.
252 words, about 1 min