POST UTME AFE BABALOLA UNIVERSITY 2025 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 100 Ω resistor is connected in series with a 200 Ω resistor and a 300 Ω resistor. If a 12 V battery is connected across the circuit, calculate the current flowing through the 200 Ω resistor.
A. 0.02 A
B. 0.03 A
C. 0.04 A
D. 0.05 A
Question 2
A parallel plate capacitor has a capaci\tance of 2 μF and is charged to a potential difference of 10 V. If a dielectric slab of dielectric cons\tant 3 is inserted between the plates, what is the new capaci\tance?
A. 6 μF
B. 8 μF
C. 10 μF
D. 12 μF
Question 3
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 4
A radioactive sample decays from 100 g to 50 g in 10 minutes. If the half-life of the sample is 5 minutes, what is the decay cons\tant?
A. 0.14 min^-1
B. 0.17 min^-1
C. 0.21 min^-1
D. 0.25 min^-1
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 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 force?
A. 8 N
B. 12 N
C. 16 N
D. 20 N
Question 7
A body of mass 5 kg is moving with a velocity of 10 m/s. If it is subjected to a force of 20 N, what is the acceleration of the body?
A. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2
Question 8
A 50 Ω resistor is connected in parallel with a 20 Ω resistor. If a potential difference of 12 V is applied across the circuit, what is the current flowing through the 50 Ω resistor?
A. 0.1 A
B. 0.2 A
C. 0.3 A
D. 0.4 A
Question 9
A sound wave with frequency $f$ is traveling through a medium with speed $v$. If the amplitude of the wave is doubled, what happens to the intensity of the wave?
A. Increases by a factor of 2
B. Increases by a factor of 4
C. Increases by a factor of 8
D. Remains the same
Question 10
A gas is contained in a cylinder with a volume of 2 L. If the temperature is increased from 20°C to 50°C, what is the new volume?
A. 2.5 L
B. 3 L
C. 4 L
D. 5 L
Question 11
A sound wave has a frequency of 200 Hz and a wavelength of 0.5 m. If the speed of sound is 340 m/s, what is the amplitude of the wave?
A. 0.05 m
B. 0.1 m
C. 0.15 m
D. 0.2 m
Question 12
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 13
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
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 parallel plate capacitor has a capaci\tance of 10 μF and is charged to a potential difference of 20 V. If the dis\tance between the plates is increased to 5 mm, what is the new capaci\tance?
A. 5 μF
B. 10 μF
C. 15 μF
D. 20 μF

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