DP Physics (first assessment 2025)

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Question 20N.1B.SL.TZ0.2c(i)

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Date November 2020 Marks available [Maximum mark: 2] Reference code 20N.1B.SL.TZ0.2c(i)
Level SL Paper 1B Time zone TZ0
Command term Explain Question number c(i) Adapted from N/A
c(i).
[Maximum mark: 2]
20N.1B.SL.TZ0.2c(i)
(c(i))

The measurements of T were collected five times. Explain how repeated measurements of T reduced the random error in the final experimental value of mr.

[2]

Markscheme

mention of mean/average value «of T» ✓

this reduces uncertainty in T / result
OR
more accurate/precise ✓

 

Reference to “random errors average out” scores MP1

Accept “closer to true value”, “more reliable value” OWTTE for MP2

 

Examiners report

Most candidates stated that the mean of 5 values of T was used to obtain an answer closer to the true value if there were no systematic errors. Some just repeated the question.

Syllabus sections