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MHT CET Physics Flashcards
81 question-and-answer cards covering Physics as it is examined in MHT CET. 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.
Define self-inductance and mutual inductance.
Self-inductance L: e = −L dI/dt; flux linkage NΦ = LI (unit henry). Mutual inductance M: EMF in coil 2 due to changing current in coil 1, e₂ = −M dI₁/dt.
For an AC circuit, define rms value and give it in terms of peak value.
The rms (root-mean-square) value is the DC equivalent that produces the same heating. I_rms = I₀/√2 = 0.707 I₀; similarly V_rms = V₀/√2.
Define inductive reactance, capacitive reactance and impedance in a series LCR circuit.
X_L = ωL = 2πfL; X_C = 1/ωC = 1/2πfC. Impedance Z = √(R² + (X_L − X_C)²). Current I = V/Z.
State the condition for resonance in a series LCR circuit and the resonant frequency.
Resonance occurs when X_L = X_C, so impedance is minimum (Z = R) and current is maximum. Resonant frequency f₀ = 1/(2π√(LC)).
State the laws of reflection and the mirror formula with magnification.
Laws of reflection: angle of incidence = angle of reflection; incident ray, reflected ray and normal lie in one plane. Mirror formula: 1/f = 1/v + 1/u. Magnification m = −v/u = h_image/h_object.
State Snell's law and define refractive index.
Snell's law: n₁ sinθ₁ = n₂ sinθ₂ (sinθ₁/sinθ₂ = constant for a given pair of media). Refractive index n = speed of light in vacuum / speed in medium = c/v = real depth/apparent depth.
What is the critical angle and the condition for total internal reflection?
Critical angle θ_C is the angle of incidence (in the denser medium) for which the refracted ray grazes the boundary at 90°; sinθ_C = 1/n. Total internal reflection occurs when light travels from denser to rarer medium and the angle of incidence exceeds θ_C.
State the lens maker's formula and the thin-lens formula.
Lens maker's: 1/f = (n − 1)(1/R₁ − 1/R₂). Thin-lens: 1/f = 1/v − 1/u. Power P = 1/f (in metres), in dioptres.
State Huygens' principle.
Every point on a wavefront acts as a source of secondary wavelets spreading out in all directions with the speed of the wave; the new wavefront is the forward envelope (tangential surface) of these secondary wavelets.
Give the conditions and the fringe-width formula for Young's double-slit interference.
Constructive (bright): path difference = nλ; destructive (dark): path difference = (2n−1)λ/2. Fringe width X = λD/d, where D = slit-to-screen distance, d = slit separation.
What is the condition for the first minimum in single-slit Fraunhofer diffraction, and how does the central maximum compare with secondary maxima?
First minimum: a sinθ = λ (a = slit width). The central maximum is twice as wide and much brighter than the secondary maxima, whose intensity falls off rapidly.
What is polarisation, and which type of waves can be polarised?
Polarisation is the restriction of the vibrations of a wave to a single plane perpendicular to the direction of propagation. Only transverse waves (e.g. light) can be polarised; longitudinal waves (e.g. sound) cannot.
State the basic properties of electromagnetic waves.
They are transverse waves with mutually perpendicular E and B fields, both perpendicular to the direction of propagation; they require no medium and travel in vacuum at c = 3 × 10⁸ m/s, where c = 1/√(μ₀ε₀) = E₀/B₀.
Arrange the electromagnetic spectrum in order of increasing frequency.
Radio waves < microwaves < infrared < visible light < ultraviolet < X-rays < gamma rays (increasing frequency / decreasing wavelength).
State Einstein's photoelectric equation and define work function and threshold frequency.
Photoelectric equation: KE_max = hν − φ₀ = hν − hν₀. Work function φ₀ is the minimum energy to eject an electron from the metal surface; threshold frequency ν₀ is the minimum frequency below which no photoelectrons are emitted.
What is the de Broglie wavelength of a particle, and how does it depend on momentum?
λ = h/p = h/(mv). The wavelength is inversely proportional to the particle's momentum. For an electron accelerated through potential V: λ = 12.27/√V Å.
State Bohr's postulates for the hydrogen atom.
1) Electrons revolve in certain stable (stationary) orbits without radiating energy. 2) Angular momentum is quantised: mvr = nh/2π. 3) Energy is emitted/absorbed only when an electron jumps between orbits: hν = E₂ − E₁.
Give the radius and energy of the nth Bohr orbit of hydrogen.
Radius r_n = 0.529 n² Å (r ∝ n²). Energy E_n = −13.6/n² eV (ground state −13.6 eV). E ∝ 1/n²; energy is negative because the electron is bound.
What is mass defect and binding energy of a nucleus?
Mass defect Δm = (sum of masses of constituent nucleons) − (actual mass of nucleus). Binding energy = Δm·c² (energy needed to split the nucleus into free nucleons); 1 u corresponds to 931.5 MeV.
Compare nuclear fission and nuclear fusion.
Fission: a heavy nucleus splits into lighter nuclei releasing energy (e.g. U-235), used in reactors and atom bombs. Fusion: light nuclei combine to form a heavier nucleus releasing energy (e.g. H→He in the Sun), requiring very high temperature/pressure.
State the law of radioactive decay and define half-life.
Radioactive decay: N = N₀e^(−λt), dN/dt = −λN, where λ is the decay constant. Half-life T₁/₂ = 0.693/λ is the time for half the nuclei to decay. Mean life τ = 1/λ.
Distinguish between intrinsic and extrinsic (n-type and p-type) semiconductors.
Intrinsic: pure semiconductor; equal numbers of electrons and holes. Extrinsic: doped. n-type (doped with pentavalent donor, e.g. P) has electrons as majority carriers; p-type (doped with trivalent acceptor, e.g. B) has holes as majority carriers.
Explain forward and reverse biasing of a p-n junction diode.
Forward bias: p-side to +, n-side to −; depletion layer narrows, barrier lowered, large current flows. Reverse bias: p-side to −, n-side to +; depletion layer widens, only a tiny leakage current flows until breakdown.
State the function of a Zener diode and of a rectifier.
A Zener diode operates in reverse breakdown at a constant voltage and is used as a voltage regulator. A rectifier (half-wave or full-wave, using diodes) converts alternating current (AC) into direct current (DC).
What this deck covers
The Physics deck follows the MHT CET Physics syllabus — 6 chapters and 20 topics — so questions land on material that is genuinely examinable rather than trivia around it. That works out to roughly 13.5 cards per chapter.
Answers are written to be recallable, not just readable — averaging about 183 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 MHT CET deck?
81 cards. This page previews 24 of them, sampled evenly across the deck so you can judge the difficulty before installing anything.
Are these MHT CET flashcards free?
Yes. The preview here is free to read with no signup, and the full 81-card deck is free inside the Examius app.
What do the Physics cards cover?
They follow the MHT CET Physics syllabus — 6 chapters and 20 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.