Question 12
WAEC
•
2025
•
PHYSICS
•
essay
Question Parts
(
a
)
(i) State two similarities associated with alpha (\( \alpha \)), beta (\( \beta \)) particle and gamma (γ) ray.
(
ii
)
Define natural radioactivity.
(
iii
)
Write a general equation for alpha decay, beta decay where \( X \) is the parent nucleus, and \( Y \) represents the daughter nuclide respectively.
(
iv
)
Mention one example of natural radioactivity.
(
b
)
(i) A kinetic energy of \( 1.80 \times 10^{-16} \mathrm{~J} \) is possessed by an electron ejected from the surface of a metal when the surface is illuminated with light. If the work function of the metal is \( 1.20 \times 10^{-16} \mathrm{~J} \), calculate the frequency of the incident photon. \( \left[c=3.0 \times 10^{8} m s^{-1}, h=6.6 \times 10^{-34} \right] \).
(
ii
)
State two characteristics of a cathode ray tube.
(
c
)
(i) Given that \( { }_{5}^{13} G \) undergoes an alpha decay I. Write an equation representing the process. II. Identify the daughter nuclide.
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About This Question
This is
Waec
2025
Physics
Question 12.
It is one of the
essay
questions from the
2025
Waec
Physics
examination.
The question covers
General
.