Figure 10 shows a Geiger-Müller (GM) tube used for measuring radioactivity - Edexcel - GCSE Physics: Combined Science - Question 6 - 2018 - Paper 1
Question 6
Figure 10 shows a Geiger-Müller (GM) tube used for measuring radioactivity.
(a) Describe how a teacher should use a Geiger-Müller (GM) tube to compare the count-rat... show full transcript
Worked Solution & Example Answer:Figure 10 shows a Geiger-Müller (GM) tube used for measuring radioactivity - Edexcel - GCSE Physics: Combined Science - Question 6 - 2018 - Paper 1
Step 1
1. Put rock(s) in front of tube
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The teacher should place the radioactive rock(s) in front of or nearby the GM tube.
Step 2
2. Measure count rate separately for the two different rocks
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The teacher should record the count rate for each rock separately to ensure accurate comparisons.
Step 3
3. Measure each count for the same time period
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The teacher needs to ensure that the count for each rock is measured over the same designated time interval to maintain consistency.
Step 4
4. Keep source-detector distance the same for both rocks
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The teacher must ensure that the distance between the GM tube and the radioactive rocks remains constant during measurement for both rocks.
Step 5
5. Take into account/measure background count
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
It's important for the teacher to measure the background radiation level and subtract this from the counts recorded to ensure accurate results.
Step 6
6. Repeat readings and take average(s)
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Finally, the teacher should repeat the measurements to confirm accuracy and calculate the average count rate from the readings obtained.
Join the GCSE students using SimpleStudy...
97% of Students
Report Improved Results
98% of Students
Recommend to friends
100,000+
Students Supported
1 Million+
Questions answered
Other GCSE Physics: Combined Science topics to explore
