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NEET UG Physics Flashcards
51 question-and-answer cards covering Physics as it is examined in NEET UG. 24 of them are printed below, taken from across the deck — no signup, no paywall on the preview.
24 sample cards from the Physics deck
Sampled from the end of the deck, so these are different cards from the ones shown on the syllabus page.
State Newton's law of cooling and the Stefan-Boltzmann law.
Newton's law of cooling: rate of heat loss ∝ temperature difference with surroundings (for small differences). Stefan-Boltzmann law: power radiated per unit area = σeT⁴ (σ = 5.67 × 10⁻⁸ W·m⁻²·K⁻⁴).
Define coefficient of linear expansion and give the relation between linear, areal, and volumetric expansion coefficients.
Linear expansion coefficient α = ΔL/(L·ΔT). For isotropic solids, areal β = 2α and volumetric γ = 3α.
State the first law of thermodynamics.
The heat supplied to a system equals the increase in internal energy plus the work done by the system: ΔQ = ΔU + ΔW.
Define an isothermal and an adiabatic process, and give the equation governing an adiabatic process.
Isothermal: temperature constant (ΔT = 0, slow process). Adiabatic: no heat exchange (ΔQ = 0). Adiabatic relation: PV^γ = constant, where γ = Cp/Cv.
State the second law of thermodynamics and the efficiency of a Carnot engine.
Second law: heat cannot spontaneously flow from a colder to a hotter body; no engine can be 100% efficient (Kelvin-Planck/Clausius statements). Carnot efficiency η = 1 − T2/T1 (temperatures in kelvin).
Give the relation between the two molar specific heats of an ideal gas (Mayer's relation).
Cp − Cv = R, where Cp and Cv are molar specific heats at constant pressure and volume and R is the universal gas constant.
State the postulates of the kinetic theory of gases and the expression for pressure.
Gas molecules are point masses in random motion, undergo perfectly elastic collisions, and have negligible intermolecular forces. Pressure P = (1/3)(mN/V)·v̄² = (1/3)ρv̄²(rms).
Write the expression for the rms speed of gas molecules and state the law of equipartition of energy.
v_rms = √(3RT/M) = √(3kT/m). Equipartition: each degree of freedom contributes (1/2)kT of energy per molecule on average.
Give the average kinetic energy per molecule of an ideal gas and the value of degrees of freedom for monatomic and diatomic gases.
Average KE per molecule = (3/2)kT (translational). Monatomic: f = 3 (γ = 5/3); diatomic: f = 5 at ordinary temperatures (γ = 7/5).
Write the equation of simple harmonic motion (SHM) and the formula for its time period.
a = −ω²x (acceleration proportional to displacement, directed toward mean position). Time period T = 2π/ω = 2π√(m/k) for a spring; T = 2π√(displacement/acceleration).
Give the time period of a simple pendulum and the expressions for KE and PE in SHM.
Simple pendulum: T = 2π√(L/g). In SHM: KE = (1/2)mω²(A² − x²); PE = (1/2)mω²x²; total energy = (1/2)mω²A² (constant).
Define resonance and distinguish free, damped, and forced oscillations.
Free oscillations occur at the natural frequency with no external force. Damped oscillations lose amplitude due to resistive forces. Forced oscillations are driven by a periodic external force; resonance is the large-amplitude response when the driving frequency equals the natural frequency.
Write the speed of a transverse wave on a stretched string and the speed of sound in a gas (Laplace).
On a string: v = √(T/μ), T = tension, μ = mass per unit length. Sound in a gas (Laplace correction): v = √(γP/ρ).
State the conditions for stationary waves and give the frequencies of harmonics in a string fixed at both ends.
Stationary waves form from superposition of two identical waves travelling in opposite directions. For a string of length L fixed at both ends: f_n = n·v/(2L), n = 1, 2, 3...
State the relation for beats and the Doppler effect formula for sound (observer and source moving).
Beat frequency = |f1 − f2|. Doppler: f' = f(v ± v_o)/(v ∓ v_s), where signs are chosen so that approach raises pitch and recession lowers it; v = speed of sound.
State Coulomb's law and define electric field intensity.
Coulomb's law: force between two point charges F = (1/4πε₀)·q1q2/r². Electric field intensity E = F/q₀ = force per unit positive test charge (N/C); for a point charge E = (1/4πε₀)q/r².
State Gauss's law and give the field of a uniformly charged infinite sheet.
Gauss's law: net electric flux through a closed surface = q_enclosed/ε₀. Field of an infinite charged sheet: E = σ/(2ε₀), independent of distance.
Define electric potential and write the energy stored in a capacitor.
Electric potential V = work done per unit charge to bring a test charge from infinity to that point (V = (1/4πε₀)q/r for a point charge). Energy in a capacitor U = (1/2)CV² = (1/2)QV = Q²/(2C).
Give the capacitance of a parallel plate capacitor and the effect of inserting a dielectric.
C = ε₀A/d (vacuum). Inserting a dielectric of constant K increases capacitance to C = Kε₀A/d, since the dielectric reduces the effective field.
State Ohm's law and define resistivity; give how resistance depends on dimensions.
Ohm's law: V = IR (current ∝ potential difference at constant temperature). Resistivity ρ is the resistance of a unit cube material. R = ρL/A (proportional to length, inversely to cross-sectional area).
State Kirchhoff's two laws for electrical circuits.
Junction (current) law: the algebraic sum of currents at a junction is zero (conservation of charge). Loop (voltage) law: the algebraic sum of potential differences around any closed loop is zero (conservation of energy).
Give the Wheatstone bridge balance condition and the formula for drift velocity.
Wheatstone bridge is balanced when P/Q = R/S (no current through the galvanometer). Drift velocity v_d = I/(nAe) = eEτ/m, where n = number density of free electrons, τ = relaxation time.
State the formulas for combining resistors in series and parallel.
Series: R_eq = R1 + R2 + R3 + ... Parallel: 1/R_eq = 1/R1 + 1/R2 + 1/R3 + ... (equivalent resistance is less than the smallest).
State the Biot-Savart law and give the magnetic field at the centre of a circular current loop.
Biot-Savart: dB = (μ₀/4π)·(I dl × r̂)/r². Field at centre of a circular loop of radius R carrying current I: B = μ₀I/(2R).
What this deck covers
The Physics deck follows the NEET UG Physics syllabus — 20 chapters and 181 topics — so questions land on material that is genuinely examinable rather than trivia around it. That works out to roughly 2.5 cards per chapter.
Answers are written to be recallable, not just readable — averaging about 161 characters, which is long enough to carry the reasoning and short enough to say out loud.
A deck like this earns its keep on the second and third pass. Read the syllabus first so you know the shape of the subject, then use the cards to find the specific facts that have not stuck.
Physics flashcards FAQ
How many Physics flashcards are in this NEET UG deck?
51 cards. This page previews 24 of them, sampled evenly across the deck so you can judge the difficulty before installing anything.
Are these NEET UG flashcards free?
Yes. The preview here is free to read with no signup, and the full 51-card deck is free inside the Examius app.
What do the Physics cards cover?
They follow the NEET UG Physics syllabus — 20 chapters and 181 topics — so the questions track what is actually examinable.
How should I use these flashcards?
Read the syllabus first so you know the shape of the subject, then drill the deck. Examius schedules each card with spaced repetition, so cards you keep missing come back sooner and ones you know drift further apart.