AQA AS Level Physics Paper 2, June 2022: Question 7

1 mark · Easy difficulty · Multiple Choice

Identify which row contains only SI fundamental base units among the given options.

Practise this question

Question

Multiple choice question 07 asks which row only contains SI fundamental base units, worth 1 mark. Four rows are provided with options A (A, kg, N, s), B (A, K, mol, s), C (C, kg, m, mol), and D (J, K, m, s), each with a corresponding answer box next to it.
Question text

07 Which row only contains SI fundamental base units?

[1 mark]

A A, kg, N, s

B A, K, mol, s

C C, kg, m, mol

D J, K, m, s

Mark scheme

Show the mark scheme Mark scheme for question 07 indicating the correct answer is B (AO1), corresponding to A, K, mol, s.

07 B (AO1) A, K, mol, s

How to answer it

Identifying SI Fundamental Base Units

What this question tests

This question assesses your factual recall and understanding of the SI system of units (specifically, distinguishing between fundamental base units and derived units) as outlined in the AQA AS Level Physics specification (Measurement and their errors).

Question 07 [1 Mark]

Exam Breakdown & Solution

✅ Correct Answer

B: A, K, mol, s

Awarded 1 mark for correctly identifying row B in the multiple-choice selection.

💡 Key Knowledge

  • A (ampere) = electric current
  • K (kelvin) = temperature
  • mol (mole) = amount of substance
  • s (second) = time

🧠 Exam Technique

Scan through every single item in a given row rather than just looking at the first one. If even one unit in a row is a derived unit (like Newtons or Coulombs), eliminate that row immediately!

❌ Common Errors

Students often confuse derived units with base units. For instance, N (newton), C (coulomb), and J (joule) are derived units, not base units, even though they have standard SI symbols.

Topics

Physics · 3.1 Measurements and their errors

Question and mark scheme from the AQA AS Level Physics examination, Paper 2, June 2022. QuestionVault is an independent revision resource; questions remain the copyright of the awarding body.