POST UTME AFE BABALOLA UNIVERSITY 2025 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 is subjected 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 2
A heat engine operates between the temperatures 300 K and 600 K. If the efficiency of the engine is 30%, what is the work done by the engine per cycle?
A. 100 J
B. 200 J
C. 300 J
D. 400 J
Question 3
A 5 kg block of ice at 0°C is placed in a 10°C water bath. Assuming the specific heat capacity of ice is 2090 J/(kg°C) and the latent heat of fusion of ice is 3.34 x 10^5 J/kg, calculate the time it takes for the ice to melt completely.
A. 10 minutes
B. 20 minutes
C. 30 minutes
D. 40 minutes
Question 4
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. 15 m
C. 20 m
D. 25 m
Question 5
A projectile is launched at an angle of 30° above the horizontal with an initial velocity of 20 m/s. If the air resis\tance is negligible, what is the maximum height reached by the projectile?
A. 10 m
B. 15 m
C. 20 m
D. 25 m
Question 6
A 10 μF capacitor is connected in series with a 20 Ω resistor and a 5 V battery. If the switch is closed at time t = 0, what is the current in the circuit at time t = 2 s?
A. 0.25 A
B. 0.5 A
C. 1 A
D. 2 A
Question 7
A particle of mass $m$ is moving in a circular orbit of radius $r$ with angular frequency $\omega$. What is the magnitude of the centripetal acceleration of the particle?
A. \frac{v^2}{r}
B. \frac{v^2}{r^2}
C. \frac{v^3}{r}
D. \frac{v^2}{r^3}
Question 8
A 100 V, 50 Hz AC source is connected to a 20 Ω resistor. What is the rms value of the current flowing through the resistor?
A. 2 A
B. 4 A
C. 6 A
D. 8 A
Question 9
A beam of light passes through a prism and is re\fracted at an angle of 30°. If the angle of incidence is 20°, what is the angle of re\fraction?
A. 25°
B. 30°
C. 35°
D. 40°
Question 10
A gas expands from an initial volume of 2 L to a final volume of 4 L against an external pressure of 1 atm. If the work done by the gas is 100 J, what is the change in internal energy?
A. 50 J
B. 100 J
C. 150 J
D. 200 J
Question 11
A wave has a frequency of 200 Hz and a wavelength of 0.5 m. What is the speed of the wave?
A. 50 m/s
B. 100 m/s
C. 150 m/s
D. 200 m/s
Question 12
A coil of wire with a resis\tance of 5 Ω is connected to a battery of 12 V. If the current flowing through the coil is 2 A, what is the induc\tance of the coil?
A. 0.1 H
B. 0.191 H
C. 0.2 H
D. 0.3 H
Question 13
A 100 Ω resistor is connected in series with a 50 Ω resistor and a 20 Ω resistor. If a 12 V battery is connected across the circuit, what is the current flowing through the 100 Ω resistor?
A. 0.2 A
B. 0.3 A
C. 0.4 A
D. 0.5 A
Question 14
A gas at a pressure of 2 atm and a temperature of 300 K is heated to a temperature of 400 K. What is the new pressure of the gas?
A. 2 atm
B. 2.67 atm
C. 3 atm
D. 4 atm
Question 15
A particle of mass 1 kg is moving in a circular path of radius 2 m with a cons\tant speed of 3 m/s. If the particle is subjected to a centripetal force of 5 N, calculate the time it takes for the particle to complete one revolution.
A. 2 seconds
B. 3 seconds
C. 4 seconds
D. 5 seconds

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