Case study·Hard exam skill (4/5)·No calculator
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Question
In an Ohm's law experiment, a group obtains these readings: in SI units.
Total: 4 marks
(a) Find the resistance using the first three readings. (2 marks)
(b) Identify the reading that does not fit the pattern. (1 mark)
(c) Give one likely experimental reason for such a reading. (1 mark)
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