Physics flashcards

118 WACE Physics cards across 2 modules (0 definitions, 66 key facts, 0 fill-the-gap, 52 formulas). Each session gives you 20 cards, due cards first. Swipe right for easy, left for hard, down for again. Keyboard: Space to flip, 1 to 4 to rate.

Loading flashcards…

What this deck covers

Sample cards from this deck

Key fact
AC and DC generators: WACE Year 12 Physics Unit 3
Tell me about Inducing the emf
The emf varies sinusoidally with a peak value $\varepsilon_0=NBA\omega$ . It is maximum when the coil plane is parallel to the field (flux changing fastest) and zero when the plane is perpendicular (flux momentarily at its peak and not changing).
Key fact
Atomic and nuclear physics: WACE Year 12 Physics Unit 4
Tell me about Atomic energy levels and spectra
Electrons in an atom can only occupy discrete energy levels. Because only certain gaps exist, only certain photon energies (and so certain wavelengths) appear: an emission spectrum is a set of bright lines on a dark background.
Key fact
Charged particles in uniform fields: WACE Year 12 Physics Unit 3
Tell me about Force and acceleration
Because the force is constant, the constant-acceleration kinematics equations apply directly.
Key fact
Atomic models and energy levels: WACE Year 12 Physics Unit 4
Tell me about Bohr's quantised levels
Bohr postulated that electrons can occupy only certain discrete, stable energy levels (orbits) without radiating, and that radiation occurs only when an electron jumps between levels. Each level has a fixed energy, with the lowest (ground state) most tightly bound and higher levels closer together near the top.
Key fact
Coulomb's law and point charges: WACE Year 12 Physics Unit 3
Tell me about Comparing with gravitation
Coulomb's law and Newton's law of gravitation share the same inverse-square form, but with two key differences. Gravity is always attractive, whereas the electrostatic force can be attractive or repulsive depending on sign.
Key fact
Atomic spectra emission and absorption: WACE Year 12 Physics Unit 4
Tell me about Emission spectra
When atoms are excited, by heating or an electric discharge, electrons jump to higher levels and then fall back, emitting photons of definite energies. Viewed through a spectrometer, this appears as bright coloured lines on a dark background.
Key fact
Electric fields and potential: WACE Year 12 Physics Unit 3
Tell me about Coulomb's law and the field of a point charge
Like charges repel; opposite charges attract. Field is a vector, pointing away from positive source charges and toward negative ones.
Key fact
Diffraction gratings and spectra: WACE Year 12 Physics Unit 4
Tell me about The grating equation
The slit spacing is usually given as lines per millimetre $N$ , so $d=1/N$ in millimetres, which you convert to metres. The zeroth order ( $m=0$ ) is straight through; higher orders appear at larger angles.
Key fact
Electromagnetic induction: WACE Year 12 Physics Unit 3
Tell me about Faraday's law
A larger field change, a faster change, or more turns all increase the emf. On a flux-time graph the induced emf is proportional to the gradient, so a steep change gives a large emf and a constant flux gives none.
Key fact
Light as a wave: WACE Year 12 Physics Unit 4
Tell me about Diffraction
Diffraction is the spreading of a wave as it passes an edge or through a gap. The effect is significant when the gap width is similar to or smaller than the wavelength: a wide gap gives little spreading, a narrow gap gives a lot.