← Electricity and electromagnetism
How this connects to your other standards
This standard is not a sealed topic. Read this first if you are also taking one of the standards below.Related in other Level 2 standards
The most direct links:
Mechanics (91171): the same "use physics principles to explain" Excellence habit Both externals reward the same skill at Excellence — a full, explicitly linked chain of physics reasoning, not a list of true but disconnected statements. Practising the linking habit for one strengthens the other directly. Atomic and nuclear physics (91172, internal): E = hf and E = mc² are the same kind of energy-from-a-formula reasoning Photon energy (E = hf) here and mass-energy (E = mc²) there both convert a fundamental formula into a real numeric answer as the core skill — the two-step "derive, then apply" pattern transfers directly. ✓The big picture in one sentence
Every question in this paper reduces to naming the right formula (V=IR, F=BIL, E=V/d, ε=I(R+r)) and then reasoning about what a described change does to every quantity in it — not to a single memorised number.Formulas that look similar across standards but mean different things
- V here is voltage; in mechanics (91171), v is speed — a lower-case/upper-case mix-up between subjects is an easy slip under exam pressure.
- I here is current; in mechanics, I can denote rotational inertia — always check which subject's question you are answering.
- E here can mean electric field strength (E = V/d) OR energy (Eₚ = qV) depending on context — read which one a given question means before substituting.