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🇵🇰 GIKI Admission Test · flashcards
GIKI Admission Test Physics Flashcards
60 question-and-answer cards covering Physics as it is examined in GIKI Admission Test. 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 the law of conservation of energy.
Energy cannot be created or destroyed, only transformed from one form to another; the total energy of an isolated system remains constant.
For a body falling freely (ignoring air resistance), how do KE and PE change, and what stays constant?
As it falls, PE decreases and KE increases by the same amount, so total mechanical energy (KE + PE) stays constant. At any height: mgh + ½mv² = constant.
Define power and give its formula in terms of work and in terms of force and velocity.
Power is the rate of doing work: P = W/t. It also equals P = F·v (force times velocity). SI unit is the watt (W = J/s); 1 hp ≈ 746 W.
Define linear momentum and state the law of conservation of momentum.
Momentum p = mv (a vector). Conservation: in the absence of external forces, the total momentum of a system before a collision equals that after the collision.
Distinguish between elastic and inelastic collisions.
In elastic collisions both momentum AND kinetic energy are conserved. In inelastic collisions momentum is conserved but kinetic energy is not (some converts to heat/deformation); in a perfectly inelastic collision the bodies stick together.
Define impulse and state its relationship to momentum.
Impulse = F·Δt = change in momentum (Δp). It equals the area under a force-time graph; SI unit is N·s (same as kg·m/s).
Define density and pressure, and give the formula for pressure due to a liquid column of height h.
Density ρ = mass/volume. Pressure P = force/area. Pressure at depth h in a liquid: P = ρgh (gauge pressure), independent of container shape.
State Pascal's principle and Archimedes' principle.
Pascal's principle: pressure applied to an enclosed fluid is transmitted undiminished throughout. Archimedes' principle: the upthrust (buoyant force) on a body equals the weight of the fluid it displaces.
What is the equation of continuity for an incompressible fluid, and what does it imply?
A₁v₁ = A₂v₂ (volume flow rate is constant). It implies fluid speed increases where the cross-sectional area decreases (narrow pipes = faster flow).
State Bernoulli's equation and the assumptions behind it.
P + ½ρv² + ρgh = constant, for an ideal fluid that is incompressible, non-viscous, and in steady (streamline) flow.
Explain, using Bernoulli's principle, why an aeroplane wing generates lift.
Air moves faster over the curved top of the wing than underneath, so by Bernoulli's principle pressure on top is lower than below. The pressure difference produces a net upward force (lift).
Define viscosity and state Stokes' law for a sphere falling through a fluid.
Viscosity is a fluid's internal resistance to flow (friction between layers). Stokes' law: drag force F = 6πηrv, where η is viscosity, r the sphere radius, and v its speed.
What is terminal velocity, and how does it arise for a sphere falling in a viscous fluid?
Terminal velocity is the constant maximum speed reached when the net force is zero, i.e., when weight = upthrust + viscous drag, so acceleration becomes zero.
Define surface tension and explain why small liquid drops are spherical.
Surface tension is the force per unit length acting along a liquid surface (or surface energy per unit area) due to cohesive forces. Drops are spherical because a sphere has the minimum surface area for a given volume, minimizing surface energy.
Define Simple Harmonic Motion (SHM) and give the defining relationship between acceleration and displacement.
SHM is oscillatory motion where acceleration is directly proportional to displacement from the mean position and directed toward it: a = −ω²x. Equivalently, the restoring force F = −kx.
Give the formulas for the time period of a mass-spring system and a simple pendulum.
Mass-spring: T = 2π√(m/k). Simple pendulum: T = 2π√(L/g), where L is length and g is gravitational acceleration. Pendulum period is independent of mass and (small) amplitude.
In SHM, where are velocity and acceleration maximum and where are they zero?
Velocity is maximum at the mean (equilibrium) position and zero at the extremes. Acceleration is maximum at the extremes and zero at the mean position. v_max = ωA and a_max = ω²A.
Distinguish between free, damped, and forced oscillations.
Free oscillations occur at the natural frequency with no external force (constant amplitude, ideally). Damped oscillations lose energy so amplitude decays. Forced oscillations are driven by a periodic external force at the driver's frequency.
What is resonance, and when does it occur?
Resonance occurs when the driving (forcing) frequency equals the natural frequency of the system, producing maximum amplitude and maximum energy transfer.
Distinguish between transverse and longitudinal waves, with an example of each.
In transverse waves particles vibrate perpendicular to wave travel (e.g., light, water ripples, string waves). In longitudinal waves particles vibrate parallel to wave travel, forming compressions and rarefactions (e.g., sound).
State the wave equation relating speed, frequency, and wavelength, and define wavelength.
v = fλ, where v is wave speed, f is frequency, and λ is wavelength (the distance between two consecutive points in phase, e.g., crest to crest).
State the principle of superposition of waves.
When two or more waves overlap, the resultant displacement at any point equals the vector sum of the individual displacements of the waves at that point.
Distinguish between constructive and destructive interference in terms of path difference.
Constructive interference (maximum amplitude) occurs when the path difference is a whole number of wavelengths (nλ). Destructive interference (minimum/zero amplitude) occurs at odd half-wavelength path differences ((n+½)λ).
What is a stationary (standing) wave, and how is it formed?
A standing wave forms when two identical waves travel in opposite directions and superpose, producing fixed nodes (zero amplitude) and antinodes (maximum amplitude). No net energy is transported along the wave.
What this deck covers
The Physics deck follows the GIKI Admission Test Physics syllabus — 10 chapters and 39 topics — so questions land on material that is genuinely examinable rather than trivia around it. That works out to roughly 6.0 cards per chapter.
Answers are written to be recallable, not just readable — averaging about 175 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 GIKI Admission Test deck?
60 cards. This page previews 24 of them, sampled evenly across the deck so you can judge the difficulty before installing anything.
Are these GIKI Admission Test flashcards free?
Yes. The preview here is free to read with no signup, and the full 60-card deck is free inside the Examius app.
What do the Physics cards cover?
They follow the GIKI Admission Test Physics syllabus — 10 chapters and 39 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.