Identify the equation
In this type, you are given a formula's name and choose its equation from four, set in real maths.
2121 questions · 6 topics
Physics formula practice
Reading a formula sheet and recalling a formula are different skills, and only one of them is what an exam asks for. These 2121 questions are generated straight from the same 252 formula entries the rest of PhysRef is built on, so the correct answer is never anything other than the reference’s own value.
A free round of 10 questions every day, the same round for everybody, retakeable as often as you like. No account, no sign-up, and your score stays in your own browser.
Building today’s round from the formula reference...
The three question types
Each one is derived from a different field of the formula record.
Symbol to quantity
In this type, you are given a symbol inside a named formula and choose the quantity it stands for.
SI unit of a quantity
In this type, you are given a quantity inside a named formula and choose its SI unit.
Topics
Every category in the reference is covered, in proportion to its formulas.
516 questions
Mechanics
Browse every mechanics formula, free, with its derivation, symbol key and calculator.
323 questions
Thermodynamics
Browse every thermodynamics formula, free, with its derivation, symbol key and calculator.
297 questions
Waves
Browse every waves formula, free, with its derivation, symbol key and calculator.
399 questions
Electricity & Magnetism
Browse every electricity & magnetism formula, free, with its derivation, symbol key and calculator.
229 questions
Optics
Browse every optics formula, free, with its derivation, symbol key and calculator.
357 questions
Modern Physics
Browse every modern physics formula, free, with its derivation, symbol key and calculator.
What costs and what does not
The daily round is free. Choosing your own is not.
Everybody gets today’s 10 question round, every day, as many times as they want, with the same feedback and the same link back to the formula page after every answer. Premium is for revising on purpose: pick the topics and question types, get a freshly shuffled round each time instead of the same one, and see your accuracy broken down by topic so you know where to spend the next session. The formulas themselves are free either way - read any of them without paying anything.