1011 past contests
Topic 5 · Equivalent capacitance of three capacitors connected in parallel
Topic 20 · The three subatomic particles that make up a nuclide
Topic 63 · Tension in a stretched string/spring from transverse wave speed and linear density
Topic 19 · Activity of a radioactive sample from decay constant and number of nuclei
Topic 9 · Identifying the visible-light wavelength among electromagnetic spectrum values
Topic 19 · Finding half-life from initial and final mass of a decaying radioisotope
Topic 44 · Equivalent inductance of two inductors connected in parallel
Topic 3 · Finding the speed of an object from its kinetic energy
Topic 5 · Electric potential at the surface of a charged conducting sphere
Topic 54 · Voltage across a resistor in a series-parallel network (voltage divider)
Topic 3 · Total mechanical energy ($KE + PE$) of a moving particle at a given height
Topic 41 · Magnetic force on a moving charged particle (f = qvb sinθ)
Topic 10 · Work done by an ideal gas in an isobaric process: $W = P\Delta V$
Topic 55 · Riddle: doping (semiconductor fabrication process)
Topic 63 · A stretched one-meter wire clamped at its ends
Topic 4 · Apparent weight on a spring scale in an accelerating elevator (true/false)
Topic 42 · Reactance of inductors connected in series
Topic 12 · Physical quantity riddle: si units and prefixes
Topic 61 · Kinetic and potential energy in simple harmonic motion: true/false
Topic 4 · Identifying levers among simple machines: true/false