- WAEC 2025
- Subject: Physics
- PIN: 789
WAEC Physics OBJ 2025
PHYSICS OBJ:
1-10: BBCDCCBCBA
11-20: ADBBCCDCBC
21-30: CDADADADBA
31-40: ABABCCBCDA
41-50: BBACBBCABC
WAEC Physics Essay 2025
PART I: ANSWER FIVE (5) QUESTIONS ONLY
Number 1
(1)
R = (U²Sin2θ)/g
Where:
-U is the initial velocity (dimension: LT⁻¹, where L is length and T is time)
-θ is the angle (dimensionless)
-g is the acceleration due to gravity (dimension: LT⁻²)
Now, let’s determine the dimension of R:
R = (U²Sin2θ)/g
R = U²/g
= ((LT⁻¹)² / (LT⁻²)
= (L²T⁻²) / (LT⁻²)
= L
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Number 2
(2)
(i) Gas Laser:
Used in barcode scanners in supermarkets and retail stores.
(ii) Chemical Laser:
Used in military applications for missile defense and high-energy laser weapons.
(iii) Dye Laser:
Used in medical treatments such as removing birthmarks and vascular skin lesions.
Number 1
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Number 2
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Number 3
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Number 4
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Number 5
Number 6
Number 7
Number 8
Number 9
Number 10
Number 11
Number 12
