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Edexcel A-Level Physics AS 2.4.67 Current and P D Distributions in Circuits Questions

Practise Edexcel A-Level Physics current and potential-difference distributions in series and parallel circuits using wires, lamps and battery connections.

Syllabus
Pearson Edexcel International Advanced Subsidiary/Advanced Level
Course
Physics XPH11/YPH11
Level
AS

Exam points

  • identify that series wires share current while potential difference can differ between wires
  • compare parallel and series lamp connections using p.d., brightness and failure behaviour
  • explain fixed-resistor roles in circuits by limiting current or protecting components

Edexcel A-Level Physics AS 2.4.67 Current and P D Distributions in Circuits Questions question 1

[Maximum number: 3]

Drivers use car headlights to emit light in dark conditions.
The graph shows how current I varies with potential difference V for a car headlight.

Figure for Question Edexcel A-Level Physics AS 2.4.67 Current and P D Distributions in Circuits Questions question 1 — Edexcel A-Level Physics AS

The headlight will emit light when it dissipates at least 35 W of power.

In a car, two headlights are connected in parallel with a 12.0 V battery. The battery has negligible internal resistance.

Explain the advantages of connecting the headlights in parallel with the battery rather than in series.

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