1011 past contests
Topic 46 · Converging lens corrects farsightedness (hyperopia)
Topic 20 · Product isotope from proton emission of sodium-18
Topic 49 · Colour produced by additively mixing cyan and red light
Topic 49 · Colour produced by additively mixing red and green light
Topic 14 · Extension of a spring from stored elastic energy and stiffness
Topic 46 · Cylindrical lens corrects astigmatism
Topic 14 · Elastic potential energy stored in a stretched spring
Topic 20 · Product isotope from positron emission of sodium-22
Topic 49 · Colour produced by additively mixing blue and red light
Topic 14 · Force to extend a spring a given distance (hooke's law)
Topic 20 · Product isotope from beta-minus decay of sodium-24
Topic 46 · Diverging lens corrects nearsightedness (myopia)
Topic 15 · Semiconductors become insulators, not conductors, at absolute zero (true/false)
Topic 54 · The wheatstone bridge compares resistances, not masses of wires (true/false)
Topic 5 · Charge on a hollow conductor resides entirely on its outer surface (true/false)
Topic 5 · Existence of upward (ground-to-cloud) lightning (true/false)
Topic 5 · Lightning as an atmospheric electrostatic discharge (true/false)
Topic 57 · Maximum power transfer condition for a battery and load (true/false)
Topic 10 · Boyle's law: $V$ versus $\dfrac{1}{P}$ is linear at constant temperature (true/false)
Topic 38 · Acceleration magnitude of a mass under two perpendicular forces