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Physics
UTME / JAMB 2026
Structure of the Nucleus
Solution
The maximum kinetic energy and work function are 2 eV and 8 eV, respectively. What is the energy of the incident radiation?
A
10 eV
B
16 eV
C
20 eV
D
6 eV
medium Difficulty
Study Explanation
Physics
UTME / JAMB 2025
Structure of the Nucleus
Solution
Calculate the decay constant of a radioactive isotope of half-life 138.5 s.
A
5.0 × 10\(^{-3}\) s\(^{-1}\)
B
5.1 × 10\(^{-3}\) s\(^{-1}\)
C
4.9 × 10\(^{-3}\) s\(^{-1}\)
D
5.2 × 10\(^{-3}\) s\(^{-1}\)
medium Difficulty
Study Explanation
Physics
UTME / JAMB 2025
Structure of the Nucleus
Solution
One of the following is not a radiation detector
A
Electrophorus
B
Scintillation chamber
C
Geiger muller counter
D
Film badge
medium Difficulty
Study Explanation
Physics
WAEC / WASSCE 2024
Structure of the Nucleus
Solution
All of the following uses are practical applications of x-ray except
A
the treatment of tumors
B
determining the depth of a mine
C
dental operation
D
detecting fractures in bones
medium Difficulty
Study Explanation
Physics
WAEC / WASSCE 2024
Structure of the Nucleus
Solution
The main difference between X-rays and gamma rays is in their
A
ionizing ability.
B
absorbing rate.
C
mode of propagation.
D
mode of production.
medium Difficulty
Study Explanation
Physics
WAEC / WASSCE 2024
Structure of the Nucleus
Solution
The correct sequence of ionization power of alpha particle, gamma ray, and beta particle respectively is
A
low, medium, high.
B
high, medium, low.
C
medium, low, high.
D
high, low, medium.
medium Difficulty
Study Explanation
Physics
UTME / JAMB 2023
Structure of the Nucleus
Solution
The half life of a radioactive material is 12 days. Calculate the decay constant.
A
0.8663 \(day^{-1}\)
B
0.04331 \(day^{-1}\)
C
0.17325 \(day^{-1}\)
D
0.05775 \(day^{-1}\)
medium Difficulty
Study Explanation
Physics
UTME / JAMB 2023
Structure of the Nucleus
Solution
Which process is responsible for production of energy in stars?
A
Nuclear reaction
B
Nuclear fission
C
Nuclear fusion
D
Radioactive decay
medium Difficulty
Study Explanation
Physics
UTME / JAMB 2023
Structure of the Nucleus
Diagram
Solution
The diagram above illustrates the penetrating power of some types of radiation. X, Y and Z are likely
A
X = α-particle; Y = γ-ray; Z = β-particle
B
X = α-particle; Y = β-particle; Z = γ-ray
C
X = γ-ray; Y = α-particle; Z = β-particle
D
X = β-particle; Y = γ-ray; Z = α-particle
medium Difficulty
Study Explanation
Physics
UTME / JAMB 2023
Structure of the Nucleus
Solution
What is the name of the model of the atom that describes electrons as orbiting the nucleus in specific energy levels?
A
Bohr model
B
Dalton model
C
Rutherford model
D
Thomson model
medium Difficulty
Study Explanation
Physics
UTME / JAMB 2023
Structure of the Nucleus
Solution
Which of the following is NOT an example of elementary modern physics?
A
Classical mechanics
B
Quantum mechanics
C
Special relativity
D
Nuclear physics
medium Difficulty
Study Explanation
Physics
WAEC / WASSCE 2022
Structure of the Nucleus
Solution
The speed of fast-moving neutrons in a nuclear reactor can be reduced by using?
A
graphite rods
B
concrete shield
C
iron rods
D
boron rods
medium Difficulty
Study Explanation
Physics
WAEC / WASSCE 2022
Structure of the Nucleus
Solution
Arrange the following radiations in order of increasing ionization of air.
I. Alpha
Il. Gamma
IIl. Beta
A
I < III < II
B
II < I < III
C
II < III < I
D
I < II
medium Difficulty
Study Explanation
Physics
WAEC / WASSCE 2022
Structure of the Nucleus
Solution
Gamma rays are produced when?
A
high velocity electrons are abruptly stopped in metals
B
energy changes occur within the nuclei of atoms
C
energy changes occur within the electronic structure of atoms
D
electrons are deflected in very strong magnetic fields
medium Difficulty
Study Explanation
Physics
UTME / JAMB 2022
Structure of the Nucleus
Solution
An isotope has an initial activity of 120 Bq. 6 days later its activity is 15 Bq. The half-life is?
A
3 days
B
2 days
C
1 day
D
4 days
medium Difficulty
Study Explanation