POST UTME ACHIEVERS UNIVERSITY 2024 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A ray of light passes from air into a glass 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 2
A person is s\tanding 10 m away from a stationary source of sound that is producing a 400 Hz sound wave. If the speed of sound is 340 m/s, what is the time interval between successive compressions of the sound wave?
A. 1.0 ms
B. 2.0 ms
C. 2.5 ms
D. 5.0 ms
Question 3
A parallel plate capacitor has plates of area 0.04 m^2 and separation 0.02 m. If the capaci\tance is 2.5 x 10^-6 F, what is the charge on the plates when the potential difference between them is 100 V?
A. 0.25 C
B. 0.125 C
C. 0.5 C
D. 1 C
Question 4
A capacitor has a capaci\tance of 0.02 F and is connected to a 12 V battery. Calculate the charge stored.
A. 0.24 C
B. 0.26 C
C. 0.28 C
D. 0.30 C
Question 5
A particle is projected at an angle of 60 degrees to the horizontal with an initial velocity of 20 m/s. What is the time of flight?
A. 2 seconds
B. 4 seconds
C. 6 seconds
D. 8 seconds
Question 6
A wave has a frequency of 100 Hz and a wavelength of 0.5 m. Calculate the speed of the wave.
A. 50 m/s
B. 100 m/s
C. 150 m/s
D. 200 m/s
Question 7
A 2.5 V battery is connected in series with a 5 ohm resistor and a 10 ohm resistor. What is the total resis\tance of the circuit?
A. 10 ohms
B. 12.5 ohms
C. 15 ohms
D. 20 ohms
Question 8
A block of mass 5 kg is susp\ended from a spring with a spring cons\tant of 100 N/m. What is the frequency of oscillation?
A. 0.5 Hz
B. 1 Hz
C. 2 Hz
D. 5 Hz
Question 9
A radioactive subs\tance has a half-life of 5 years. If 100 grams of the subs\tance is initially present, how many grams will remain after 10 years?
A. 12.5 grams
B. 25 grams
C. 50 grams
D. 100 grams
Question 10
A sound wave with a frequency of 200 Hz and an amplitude of 0.5 m is traveling through a medium with a speed of 340 m/s. What is the wavelength of the sound wave?
A. 1.5 m
B. 1.7 m
C. 2.0 m
D. 2.5 m
Question 11
A liquid of density 1000 kg/m^3 is flowing through a pipe of radius 0.1 m. What is the pressure at the center of the pipe?
A. 1000 Pa
B. 2000 Pa
C. 5000 Pa
D. 10000 Pa
Question 12
A radioactive sample undergoes \alpha decay, emitting an \alpha particle with a mass of 4 u and a charge of +2e. If the sample's initial mass is 200 g, what is the mass of the daughter nucleus after 3 half-lives?
A. 25 g
B. 50 g
C. 100 g
D. 200 g
Question 13
A capacitor of capaci\tance 10^-6 F is charged to a potential difference of 100 V. What is the energy stored in the capacitor?
A. 0.01 J
B. 0.1 J
C. 1 J
D. 10 J
Question 14
A ray of light passes from air into a glass of re\fractive index 1.5. If the angle of incidence is 30°, what is the angle of re\fraction?
A. 20°
B. 30°
C. 40°
D. 50°
Question 15
A parallel plate capacitor has plates of area 0.04 m^2 and separation 0.02 m. If the dielectric cons\tant of the material between the plates is 3, calculate the capaci\tance.
A. 0.01 F
B. 0.02 F
C. 0.03 F
D. 0.04 F

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