POST UTME UNIOSUN 2023 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 2.0 kg block is attached to a horizontal spring with a force cons\tant of 100 N/m. The block is displaced by 0.5 m from its equilibrium position and released from rest. Calculate the maximum speed of the block.
A. 2.0 m/s
B. 2.1 m/s
C. 2.2 m/s
D. 2.3 m/s
Question 2
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 3
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 4
A gas is heated from 20°C to 50°C at cons\tant pressure. Calculate the final volume of the gas if the initial volume is 2 L.
A. 4 L
B. 5 L
C. 6 L
D. 8 L
Question 5
A point charge of +2.0 μC is placed at the origin. What is the electric potential at a point 0.50 m away from the charge, in the x-direction?
A. 1000 V
B. 2000 V
C. 3000 V
D. 4000 V
Question 6
A circuit consists of a 10 Ω resistor, a 20 Ω resistor, and a 30 Ω resistor connected in series. A voltage of 12 V is applied across the circuit. What is the current flowing through the circuit?
A. 0.50 A
B. 1.00 A
C. 1.50 A
D. 2.00 A
Question 7
A light ray passes from air into a glass block with a re\fractive index of 1.5. If the angle of incidence is 30°, calculate the angle of re\fraction.
A. 20°
B. 21°
C. 22°
D. 23°
Question 8
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 9
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 10
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 11
A vector has a magnitude of 5 units and makes an angle of 30° with the positive x-axis. What is the x-component of the vector?
A. 4.33 units
B. 4.58 units
C. 4.83 units
D. 5.08 units
Question 12
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 13
A point charge of +2 μC is placed at the origin. A second point charge of -3 μC is placed 0.5 m away from the first charge. What is the magnitude of the electric field at a point 0.2 m away from the second charge, in the direction of the second charge?
A. 2.5 × 10^4 N/C
B. 5.0 × 10^4 N/C
C. 1.0 × 10^5 N/C
D. 2.0 × 10^5 N/C
Question 14
A gas is heated from 20°C to 80°C at cons\tant volume. If the initial pressure is 1 atm, what is the final pressure?
A. 2 atm
B. 3 atm
C. 4 atm
D. 5 atm
Question 15
A body of mass 5 kg is moving with a velocity of 10 m/s. What is its momentum?
A. 50 kg m/s
B. 100 kg m/s
C. 150 kg m/s
D. 200 kg m/s

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