A-LevelPhysicsD.C. circuits9702/12 · Oct/Nov 2020 · Q351 Mark

A resistor and a filament lamp are connected in series with a power supply. The I-V characteristics of the resistor and of the lamp are shown below. [Figure 35.1] The potential difference (p.d.) across the resistor is 3.3 V. What is the resistance of the lamp?

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A0.071 Ω

B4.2 Ω

C11 Ω

D14 Ω

✓ Correct answer

D: 14 Ω

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Topic: D.C. circuits, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2020 Paper 1 Variant 2, question 35.

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