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| Unit | Item | Definition | Definition Source | Equation |
|---|---|---|---|---|
| 11.3 | Capacitance | Ratio of potential difference to charge stored. | IB Exam 13N.1.HL.TZ0.39 | \(C=\frac{Q}{V}\) |
| 11.3 | Capacitance | charge stored by the device for a potential difference of 1V across the device. | IB Exam 12N.1.HL.TZ0.39 | |
| \(E=mc^2\) | ||||
| 11.1 | Magnetic flux | magnetic flux density/magnetic field strength normal to a surface × area of surface. | IB Exam 14M.2.HL.TZ2.5 | |
| 7.1 | Radioactive half-life | Time taken for N/2 atoms to undergo decay. | IB Exam 15M.1.SL.TZ2.24 | |
| 5.1 | Electric field strength | the force exerted per unit charge; on a positive small/test charge; | IB Exam 13N.2.SL.TZ0.4 (Markscheme) | |
| 7.1 | Isotope | same proton number/element/number of protons and different number of neutrons/nucleon number/neutron number; | IB Exam 13N.2.SL.TZ0.4 (Markscheme) | |
| 7.1 | Half-life | time for the activity (of a radioactive sample) to fall by half its original value / time for half the radioactive/unstable nuclei/atoms (in a sample) to decay; | IB Exam 13N.2.SL.TZ0.4 (Markscheme) | |