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Edexcel A-Level Physics Improving Experimental Method

Review improving experimental method in Edexcel A-Level Physics through data loggers, probes, video recording and accuracy-focused modifications.

Syllabus
Pearson Edexcel International Advanced Subsidiary/Advanced Level
Course
Physics XPH11/YPH11
Level
A2

Exam points

  • explain data logger improvements such as simultaneous readings and many readings in short times
  • judge sensors, probes or video recording by resolution, parallax reduction and accuracy gains
  • suggest method modifications that give more accurate readings, such as count-rate measurements

6.4.1 - Improving experimental method question 1

[Maximum number: 2]

Two identical capacitors were connected in series and charged. They were then discharged through a resistor and ammeter.
A student investigated how the current in the resistor varied as the capacitors discharged.

The student repeated the investigation but used a data logger instead of a stopwatch and an ammeter.

Suggest why using a data logger would improve this investigation.

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