Case study·Standard multi-step (3/5)·Calculator allowed
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
The terminal voltage graph of a cell is shown. The same cell is then connected to an external resistor of .
Total: 5 marks
(a) Find the emf of the cell from the graph. (1 mark)
(b) Find the internal resistance of the cell. (2 marks)
(c) Find the current and terminal voltage when connected to the 3.6 ohm resistor. (2 marks)
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