POST UTME UNILORIN 2025 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A nucleus of mass number 240 and atomic number 94 undergoes \alpha decay. What is the mass number of the daughter nucleus?
A. 236
B. 238
C. 240
D. 242
Question 2
A capacitor of capaci\tance 10 μF is connected to a battery of voltage 5 V. If the capacitor is initially uncharged, what is the charge stored on the capacitor after 2 seconds?
A. 50 μC
B. 100 μC
C. 150 μC
D. 200 μC
Question 3
A body is in equilibrium under the action of three forces. Two of the forces are 5 N and 10 N, acting at an angle of 60° to each other. The third force is 15 N, acting perp\endicular to the line of action of the other two forces. Calculate the magnitude of the resul\tant force.
A. 20 N
B. 25 N
C. 30 N
D. 35 N
Question 4
A particle moves in a circular path with a cons\tant speed of 4.0 m/s. If the radius of the circle is 2.0 m, calculate the magnitude of the acceleration of the particle.
A. 4.0 m/s^2
B. 8.0 m/s^2
C. 12.0 m/s^2
D. 16.0 m/s^2
Question 5
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. If the particle is subjected to a centripetal force of 12 N, what is the magnitude of the acceleration of the particle?
A. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2
Question 6
A ray 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 7
A charged particle of mass 1 kg and charge 2 C is moving in a magnetic field of strength 5 T. If the particle is moving with a velocity of 3 m/s, what is the magnitude of the force acting on the particle?
A. 30 N
B. 40 N
C. 50 N
D. 60 N
Question 8
A capacitor is connected to a battery and a resistor in series. If the capacitor is charged to a potential difference of 10 V and the resistor has a resis\tance of 5 Ω, what is the time cons\tant?
A. 0.05 s
B. 0.1 s
C. 0.2 s
D. 0.5 s
Question 9
A 10 μF capacitor is connected in series with a 5 kΩ resistor and a 20 V battery. Calculate the time cons\tant of the circuit.
A. 0.1 s
B. 0.5 s
C. 1 s
D. 2 s
Question 10
A 100 W light bulb is connected to a 220 V power source. Calculate the current drawn by the bulb.
A. 0.45 A
B. 0.5 A
C. 0.55 A
D. 0.6 A
Question 11
A lens of focal length 20 cm is used to form an image of an object placed 30 cm away. What is the nature of the image formed?
A. Real and inverted
B. Virtual and erect
C. Real and erect
D. Virtual and inverted
Question 12
A vector has a magnitude of 5 units and makes an angle of 30° with the positive x-axis. Calculate the x and y components of the vector.
A. x-component: 4, y-component: 2.5
B. x-component: 3, y-component: 4
C. x-component: 2, y-component: 4.5
D. x-component: 1, y-component: 5
Question 13
A particle is moving in a circular path with a cons\tant speed of 5 m/s. The radius of the path is 2 m. What is the magnitude of the force acting on the particle?
A. 10 N
B. 20 N
C. 30 N
D. 40 N
Question 14
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. If the particle is subjected to a centripetal acceleration of 2 m/s^2, what is the magnitude of the net force acting on the particle?
A. 8 N
B. 10 N
C. 12 N
D. 16 N
Question 15
A block of mass 5 kg is susp\ended from a spring with a spring cons\tant of 200 N/m. If the block is displaced by 0.2 m from its equilibrium position, what is the magnitude of the force exerted by the spring?
A. 40 N
B. 80 N
C. 120 N
D. 160 N

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