Curriculum
Course: Igcse Physics
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Curriculum

Igcse Physics

1. Motion, Forces and Energy

0/161 Dr Dabour Hub Science Diagram and Course Material

2. Thermal Physics

0/75 Dr Dabour Hub Science Diagram and Course Material

3. Waves

0/77 Dr Dabour Hub Science Diagram and Course Material

4. Electricity and Magnetism

0/119 Dr Dabour Hub Science Diagram and Course Material

5. Nuclear Physics

0/39 Dr Dabour Hub Science Diagram and Course Material

6. Space Physics

0/47 Dr Dabour Hub Science Diagram and Course Material
Quiz

5.2.1 Background Radiation – Check yourself

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1.
Which is a natural source of background radiation?
Medical X-rays
Nuclear weapon tests
Radon gas
Smoke detectors
2.
A GM tube is placed in a room with no source and still clicks. This is because of
background radiation
a faulty tube
static electricity
sound
3.
A measured count rate is 340 counts per minute and background is 40 counts per minute. The corrected rate is
380
8.5
340
300
4.
Why are counts taken over several minutes?
The tube takes time to warm up
Radioactive decay is random
The background changes at night
Long counts reduce radiation
5.
Cosmic ray exposure is greatest
at high altitude
at sea level
underground
in a lead-lined room
6.
A background of 0.5 counts per second gives how many counts in 10 minutes?
5
30
3000
300
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