Curriculum
Course: IB Physics HL
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Curriculum

IB Physics HL

Theme A — Space, Time and Motion

0/125 Dr Dabour Hub Science Diagram and Course Material

Theme B — The Particulate Nature of Matter

0/105 Dr Dabour Hub Science Diagram and Course Material

Theme C — Wave Behaviour

0/73 Dr Dabour Hub Science Diagram and Course Material

Theme D — Fields

0/77 Dr Dabour Hub Science Diagram and Course Material

Theme E — Nuclear and Quantum Physics

0/89 Dr Dabour Hub Science Diagram and Course Material

Tools and Inquiry — IB Physics skills

0/43 Dr Dabour Hub Science Diagram and Course Material
Quiz

E.3.6 Decay Constant and Half-Life – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
The unit of the decay constant is...
Bq
s
no unit
s−1
2.
A nuclide has T½ = 100 s. What is λ?
0.069 s−1
0.0069 s−1
144 s−1
0.01 s−1
3.
If N doubles with λ unchanged, the activity...
halves
is unchanged
doubles
quadruples
4.
Two nuclides have decay constants λ and 3λ. Their half-lives are in the ratio (first : second)...
3 : 1
1 : 3
1 : 9
9 : 1
5.
A sample of 5.0 × 1012 nuclei has activity 2.5 × 106 Bq. The decay constant is...
2.0 × 106 s−1
5.0 × 10−7 s−1
1.25 × 1019 s−1
2.5 × 10−6 s−1
6.
Which statement about the decay constant is correct?
It increases as the sample decays
It depends on temperature
It equals the half-life
It is a constant for a given nuclide
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Part of Theme E — Nuclear and Quantum Physics — see every lesson and quiz in this unit.
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