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Edexcel A-Level Physics A2 5.4.137 Background Radiation Questions

Practise Edexcel A-Level Physics background radiation by correcting measured count rates and judging factors that affect background counts.

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

Exam points

  • correct source count rates by subtracting the measured background count rate
  • judge background-count accuracy from counting time, detector sensitivity and measurement location

Edexcel A-Level Physics A2 5.4.137 Background Radiation Questions question 1

[Maximum number: 1]

A student used a detector and counter to measure the background radiation count for five minutes. He used this value to calculate the background count rate.

Which of the following would increase the accuracy of the student's value for the background count rate?

A

Decrease the counting time to 1 minute.

B

Increase the counting time to 10 minutes.

C

Repeat the count with a different detector and calculate a mean value.

D

Repeat the count in a different location and calculate a mean value.

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