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A-LevelPhysicsD.C. circuits9702/12 · Oct/Nov 2017 · Q361 Mark

A typical mobile phone battery has an e.m.f. of 5.0 V and an internal resistance of 200 mΩ. What is the terminal p.d. of the battery when it supplies a current of 500 mA?

A4.8 V
B4.9 V
C5.0 V
D5.1 V

✓ Correct answer

B: 4.9 V

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About this question

Topic
D.C. circuits, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source
A-Level Physics, Oct/Nov 2017 Paper 1 Variant 2, question 36.

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