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Nuclear Physics /
Quiz 2

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NCAT - Practice Test - Physics - Nuclear Physics Quiz

Attempt 10 MCQs on NCAT - Practice Test - Physics - Nuclear Physics | Quiz 2

11. What are beta particles?

Helium nuclei
Electrons
Photons
Neutrons

12. What are the properties of gamma radiation?

High ionisation, low penetration
Low ionisation, high penetration
Medium both
No penetration

13. What happens to atomic and mass numbers in alpha decay?

Z-2, A-4
Z-1, A-0
Z+1, A-0
Z-1, A-1

14. What changes occur in β⁻ decay?

Z-1, A unchanged
Z+1, A unchanged
Z unchanged, A-1
Z+1, A+1

15. How does atomic number change in β⁺ decay?

Z+1
Z-1
Z unchanged
Z-2

16. How do Z and A change in gamma decay?

Changes Z and A
Changes Z only
Changes A only
No change in Z or A

17. Fraction remaining after 20 years if half-life = 10 years?

1/2
1/4
1/8
1/16

18. How many atoms remain after one half-life?

250
500
750
1000

19. Calculate λ for half-life 10 seconds.

0.693 s⁻¹
0.0693 s⁻¹
6.93 s⁻¹
0.00693 s⁻¹

20. What is the radioactive decay law?

N₀ e^{λt}
N₀ e^{-λt}
N₀ (1 - e^{-λt})
N₀ λ t

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