POST UTME UNIBEN 2024 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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 experiences a centripetal acceleration of 2 m/s^2, what is the magnitude of the force acting on the particle?
A. 10 N
B. 12 N
C. 16 N
D. 20 N
Question 2
A radioactive sample decays from 100 g to 50 g in 10 days. What is the half-life of the sample?
A. 5 days
B. 10 days
C. 15 days
D. 20 days
Question 3
A magnetic field is produced by a current-carrying wire. If the current is 2 A and the length of the wire is 0.5 m, what is the magnetic field strength?
A. 0.1 T
B. 0.2 T
C. 0.3 T
D. 0.4 T
Question 4
A vector A has a magnitude of 5 units and makes an angle of 30° with the positive x-axis. If vector B has a magnitude of 3 units and makes an angle of 60° with the positive x-axis, what is the magnitude of the resul\tant vector A + B?
A. 4 units
B. 5 units
C. 6 units
D. 7 units
Question 5
A ray of light passes from air into a glass block with a re\fractive index of 1.5. If the angle of incidence is 30°, what is the angle of re\fraction?
A. 20°
B. 30°
C. 40°
D. 50°
Question 6
A particle of mass 0.5 kg is attached to a spring with a spring cons\tant of 100 N/m. The particle is displaced by 0.2 m from its equilibrium position and released from rest. Calculate the maximum speed of the particle.
A. 0.2 m/s
B. 0.4 m/s
C. 0.6 m/s
D. 0.8 m/s
Question 7
A convex lens of focal length 20 cm is used to form an image of an object placed 30 cm in front of it. Calculate the magnification of the image.
A. -0.5
B. -0.6
C. -0.7
D. -0.8
Question 8
A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in series. If the current is 2 A, what is the total resis\tance?
A. 8 Ω
B. 10 Ω
C. 12 Ω
D. 16 Ω
Question 9
A body of mass 5 kg is moving with a velocity of 10 m/s. It is subjected to a force of 20 N. Calculate the acceleration of the body u\sing Newton's second law.
A. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2
Question 10
A block of mass 5 kg is attached to a horizontal spring with a force cons\tant of 100 N/m. If the block is displaced by 2 m from its equilibrium position and released, what is the maximum speed?
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s
Question 11
A convex lens of focal length 0.2 m is placed in contact with a concave lens of focal length -0.3 m. What is the focal length of the combination?
A. 0.1 m
B. 0.2 m
C. 0.3 m
D. 0.4 m
Question 12
A circuit consists of a 10 Ω resistor and a 20 Ω resistor connected in series. A voltage of 50 V is applied across the circuit. Calculate the current flowing through the circuit.
A. 1 A
B. 2 A
C. 3 A
D. 4 A
Question 13
A 2 kg block is attached to a horizontal, massless spring with a spring cons\tant of 100 N/m. The block is displaced by 0.2 m from its equilibrium position and released from rest. Calculate the time taken by the block to reach its maximum speed.
A. 0.2 s
B. 0.4 s
C. 0.6 s
D. 0.8 s
Question 14
A gas expands from 1.0 L to 2.0 L against a cons\tant external pressure of 2.0 atm. If the initial temperature is 300 K, what is the final temperature?
A. 200 K
B. 250 K
C. 300 K
D. 350 K
Question 15
A car travels from rest to a speed of 25 m/s in 10 s. What is the acceleration of the car?
A. 2.5 m/s²
B. 5 m/s²
C. 10 m/s²
D. 15 m/s²

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