POST UTME UNIOSUN 2023 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A ray of light passes from air into a glass slab. If the angle of incidence is 30°, what is the angle of re\fraction?
A. 20°
B. 30°
C. 40°
D. 50°
Question 2
A particle of mass 2.0 kg is moving in a circular path of radius 3.0 m with a cons\tant speed of 4.0 m/s. What is the magnitude of the net force acting on the particle?
A. 10 N
B. 20 N
C. 30 N
D. 40 N
Question 3
A radioactive sample has a half-life of 5 years. If the initial activity is 1000 Bq, calculate the activity after 15 years.
A. 125 Bq
B. 150 Bq
C. 175 Bq
D. 200 Bq
Question 4
A 5.0 kg block 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 on the block?
A. 40 N
B. 80 N
C. 120 N
D. 160 N
Question 5
A 50 Hz AC voltage is applied across a 10 Ω resistor. What is the rms value of the current flowing through the resistor?
A. 0.5 A
B. 1 A
C. 2 A
D. 5 A
Question 6
A block of mass 5.0 kg is placed on a frictionless surface. A force of 20 N is applied to the block, cau\sing it to accelerate at 2.0 m/s^2. What is the magnitude of the normal force acting on the block?
A. 10 N
B. 20 N
C. 30 N
D. 40 N
Question 7
A beam of light of wavelength 500 nm is incident on a glass slab of re\fractive index 1.5. If the angle of incidence is 30°, calculate the angle of re\fraction.
A. 20°
B. 30°
C. 40°
D. 50°
Question 8
A body of mass 2 kg is moving with a velocity of 5 m/s. What is its kinetic energy?
A. 12.5 J
B. 25 J
C. 50 J
D. 100 J
Question 9
A particle of mass 2 kg is moving in a circular path of radius 3 m with a speed of 4 m/s. Calculate the magnitude of the centripetal force acting on the particle.
A. 10 N
B. 20 N
C. 30 N
D. 40 N
Question 10
A radioactive sample has a half-life of 5.0 years. If the initial activity is 100 Bq, what is the activity after 10 years?
A. 12.5 Bq
B. 25 Bq
C. 37.5 Bq
D. 50 Bq
Question 11
A lens of focal length 20 cm is used to form an image of an object at a dis\tance of 30 cm from the lens. Calculate the magnification of the lens.
A. 1
B. 2
C. 3
D. 4
Question 12
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 subject to a centripetal force of 12 N, what is the magnitude of the acceleration of the particle?
A. 4 m/s^2
B. 6 m/s^2
C. 8 m/s^2
D. 10 m/s^2
Question 13
A radioactive sample decays at a rate of 0.05% per hour. If the initial activity is 1000 Bq, what is the activity after 5 hours?
A. 900 Bq
B. 950 Bq
C. 990 Bq
D. 1000 Bq
Question 14
A particle of mass 2.0 kg is moving in a circular path with a radius of 0.50 m. The particle has a speed of 5.0 m/s. What is the magnitude of the centripetal force acting on the particle?
A. 10 N
B. 20 N
C. 30 N
D. 40 N
Question 15
A particle of mass 2 kg is attached to a spring with a spring cons\tant of 100 N/m. It is displaced by 0.2 m from its equilibrium position and released from rest. What is the frequency of its oscillations?
A. 0.5 Hz
B. 1 Hz
C. 2 Hz
D. 5 Hz

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