POST UTME ABU 2025 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A beam of light passes from air into a glass slab of re\fractive index 1.5. If the angle of incidence is 30°, what is the angle of re\fraction?
A. 20°
B. 25°
C. 30°
D. 35°
Question 2
A wave has a frequency of 20 Hz and a wavelength of 0.5 m. Calculate the speed of the wave.
A. 10 m/s
B. 20 m/s
C. 30 m/s
D. 40 m/s
Question 3
A particle of mass 1 kg is moving in a straight line with a velocity of 5 m/s. If the particle experiences a force of 2 N, what is the acceleration of the particle?
A. 0.5 m/s²
B. 1 m/s²
C. 1.5 m/s²
D. 2 m/s²
Question 4
A particle of mass 2 kg is moving in a circular path of radius 5 m with a cons\tant speed of 10 m/s. If the particle is subject to a centripetal force of 20 N, calculate the time taken for the particle to complete one revolution.
A. 2 s
B. 4 s
C. 6 s
D. 8 s
Question 5
A light ray passes through a prism of re\fractive index $n$ and is deviated by an angle $\delta$. If the angle of incidence is $i$, determine the angle of re\fraction $r$.
A. \sin i = n \sin r
B. \sin i = \frac{1}{n} \sin r
C. \sin i = \sin r
D. \sin i = \cos r
Question 6
A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in series. What is the total resis\tance in the circuit?
A. 10 Ω
B. 12 Ω
C. 14 Ω
D. 16 Ω
Question 7
A particle of mass 2 kg is moving in a circular path of radius 3 m with a cons\tant speed of 4 m/s. What is the magnitude of the centripetal acceleration?
A. 1.33 m/s^2
B. 2.67 m/s^2
C. 4 m/s^2
D. 5.33 m/s^2
Question 8
A nucleus of mass number 240 and atomic number 94 undergoes \alpha decay. If the daughter nucleus has a mass number of 224, what is the mass number of the emitted \alpha particle?
A. 16
B. 32
C. 48
D. 64
Question 9
A capacitor of capaci\tance 10 μF is charged to a potential difference of 12 V. What is the energy stored in the capacitor?
A. 120 J
B. 150 J
C. 180 J
D. 200 J
Question 10
A lens of focal length 20 cm forms an image of an object at a dis\tance of 15 cm. What is the magnification of the lens?
A. 0.5
B. 1
C. 2
D. 3
Question 11
A 5 μF capacitor is connected in parallel with a 10 kΩ resistor. If the capacitor is initially uncharged and the resistor is connected to a 12 V DC source, calculate the time it takes for the capacitor to reach 90% of its final voltage.
A. 10 ms
B. 20 ms
C. 30 ms
D. 40 ms
Question 12
A light ray passes from air into a glass slab of re\fractive index 1.5. If the angle of incidence is 30°, what is the angle of re\fraction?
A. 20°
B. 25°
C. 30°
D. 35°
Question 13
A body of mass 5 kg is at rest on a frictionless surface. A horizontal force of 10 N is applied to the body. Calculate the acceleration of the body.
A. 0.5 m/s^2
B. 1 m/s^2
C. 2 m/s^2
D. 5 m/s^2
Question 14
A particle of mass $m$ is projected from the origin with an initial velocity $v_0$ at an angle $\theta$ to the horizontal. If the particle experiences a cons\tant acceleration $g$ due to gravity, determine the time $t$ at which the particle reaches its maximum height.
A. t = \frac{v_0 \sin \theta}{g}
B. t = \frac{v_0 \cos \theta}{g}
C. t = \frac{v_0 \sin \theta}{g^2}
D. t = \frac{v_0 \cos \theta}{g^2}
Question 15
A block of mass 5 kg is placed on a frictionless surface and a force of 20 N is applied to it. What is the acceleration of the block?
A. 2 m/s²
B. 3 m/s²
C. 4 m/s²
D. 5 m/s²

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