POST UTME ABU 2023 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A capacitor of capaci\tance 20 μF is connected in parallel with a resistor of resis\tance 10 Ω. If a voltage of 100 V is applied across the circuit, what is the current flowing through the resistor?
A. 10 A
B. 20 A
C. 30 A
D. 40 A
Question 2
A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in series. If the current through the circuit is 2 A, what is the voltage across the 6 Ω resistor?
A. 6 V
B. 8 V
C. 10 V
D. 12 V
Question 3
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 30° above the horizontal. If the air resis\tance is negligible, what is the maximum height reached by the projectile?
A. 10 m
B. 20 m
C. 30 m
D. 40 m
Question 4
A particle moves in a circular path with a radius of 0.5 m and a speed of 2 m/s. If the particle completes one revolution in 2 seconds, 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 5
A light ray passes from air into a block of glass. If the angle of incidence is 30°, what is the angle of re\fraction?
A. 20°
B. 25°
C. 30°
D. 35°
Question 6
A particle of mass 1 kg is moving in a circular path with a radius of 0.5 m. If the particle has a speed of 2 m/s, what is the centripetal acceleration?
A. 4 m/s²
B. 6 m/s²
C. 8 m/s²
D. 10 m/s²
Question 7
A light ray passes through a prism and is re\fracted. What is the angle of deviation?
A. 10°
B. 20°
C. 30°
D. 40°
Question 8
A light ray passes through a prism and is re\fracted. If the angle of incidence is 30° and the angle of re\fraction is 20°, what is the angle of deviation?
A. 50°
B. 60°
C. 70°
D. 80°
Question 9
A block of mass 5 kg is moving with a velocity of 10 m/s on a frictionless surface. It collides with a stationary block of mass 10 kg. Assuming the collision is perfectly elastic, calculate the velocity of the 10 kg block after the collision.
A. 5 m/s
B. 10 m/s
C. 15 m/s
D. 20 m/s
Question 10
A sound wave has a frequency of 200 Hz and a speed of 340 m/s. If the wavelength is 1.7 m, what is the amplitude?
A. 0.1 m
B. 0.2 m
C. 0.3 m
D. 0.4 m
Question 11
A radioactive sample emits \alpha particles with a half-life of 5 days. If the initial activity is 100 Bq, what is the activity after 10 days?
A. 50 Bq
B. 25 Bq
C. 12.5 Bq
D. 6.25 Bq
Question 12
A gas is enclosed in a container with a movable piston. The gas is heated, cau\sing its pressure to increase. Which of the following statements is true about the change in the gas's volume?
A. The volume of the gas will decrease.
B. The volume of the gas will increase.
C. The volume of the gas will remain cons\tant.
D. The volume of the gas will decrease and then increase.
Question 13
A block of mass 2 kg is attached to a horizontal spring with a force cons\tant of 100 N/m. If the block is displaced by 0.2 m from its equilibrium position and released from rest, what is the maximum speed of the block?
A. 0.5 m/s
B. 1 m/s
C. 1.5 m/s
D. 2 m/s
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 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 15
A radioactive sample has a half-life of 10 years. If the initial activity is 100 Bq, calculate the activity after 20 years.
A. 25 Bq
B. 50 Bq
C. 75 Bq
D. 100 Bq

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