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
A circuit uses a resistor in series with a parallel combination of and , connected to a V source.
Total: 4 marks
(a) Find the equivalent resistance of the parallel part. (1 mark)
(b) Find the total resistance and total current. (2 marks)
(c) Find the potential difference across the resistor. (1 mark)
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