Waec 2025 Physics Question 12

Practice essay / theory question 12 from the 2025 Waec Physics examination. This question covers General .

Waec 2025 Physics Essay / Theory
Topic: General
Question 12 WAEC • 2025 • PHYSICS • essay

(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.

Question Parts

( a )
(i) State two similarities associated with alpha (\( \alpha \)), beta (\( \beta \)) particle and gamma (γ) ray.
( b )
(ii) Define natural radioactivity.
( c )
(iii) Write a general equation for alpha decay, beta decay where \( X \) is the parent nucleus, and \( Y \) represents the daughter nuclide respectively.
( d )
(iv) Mention one example of natural radioactivity.
( e )
(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. \( \left[c=3.0 \times 10^{8} m s^{-1}, h=6.6 \times 10^{-34} \right] \).
( f )
(ii) State two characteristics of a cathode ray tube.
( g )
(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 .

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