POST UTME UNIOSUN 2017 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A nucleus of mass number $A$ and atomic number $Z$ undergoes \beta decay. What is the resulting nucleus?
A. A-1,Z+1
B. A+1,Z-1
C. A,Z
D. A,Z+1
Question 2
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 30° above the horizontal. What is the maximum height reached by the projectile?
A. 10 m
B. 15 m
C. 20 m
D. 25 m
Question 3
A sound wave of frequency 200 Hz has a speed of 340 m/s. What is the wavelength?
A. 1.7 m
B. 1.7 cm
C. 17 m
D. 17 cm
Question 4
A capacitor is connected to a power source of 12 V. If the capaci\tance is 10 μF, what is the charge stored?
A. 0.12 C
B. 0.12 μC
C. 120 μC
D. 1200 μC
Question 5
A sound wave with a frequency of 200 Hz has a speed of 343 m/s. What is the wavelength of the sound wave?
A. 1.715 m
B. 1.71 m
C. 1.72 m
D. 1.73 m
Question 6
A sound wave has a frequency of 200 Hz and a speed of 340 m/s. What is the wavelength of the wave?
A. 1.7 m
B. 1.8 m
C. 1.9 m
D. 2.0 m
Question 7
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. 6 m/s^2
B. 8 m/s^2
C. 10 m/s^2
D. 12 m/s^2
Question 8
A wave has a frequency of 20 Hz and a wavelength of 0.5 m. What is the speed of the wave?
A. 10 m/s
B. 20 m/s
C. 30 m/s
D. 40 m/s
Question 9
A 10 mH inductor is connected in series with a 20 μF capacitor and a 100 Hz AC source. Calculate the impedance of the circuit.
A. 10 Ω
B. 20 Ω
C. 30 Ω
D. 40 Ω
Question 10
A spring with a force cons\tant of 100 N/m is stretched by 0.5 m. If the spring is then released from rest, what is the maximum speed of the spring?
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s
Question 11
A particle of mass 3 kg is moving in a circular path with a radius of 2 m. If the particle's velocity is 6 m/s, what is its angular velocity?
A. \( \frac{6}{2} \) rad/s
B. \( \frac{2}{6} \) rad/s
C. \( \frac{6}{2} \) rad/s
D. \( \frac{2}{6} \) rad/s
Question 12
A radioactive sample has an initial activity of 100 Bq. If the half-life of the sample is 10 minutes, what is the activity after 20 minutes?
A. 25 Bq
B. 50 Bq
C. 75 Bq
D. 100 Bq
Question 13
A 100 μC charge is moving at a speed of 2 m/s in a circular path of radius 5 m. What is the magnitude of the magnetic field at the center of the circle?
A. 0.1 T
B. 0.2 T
C. 0.5 T
D. 1 T
Question 14
A sound wave with frequency $f$ is traveling through a medium with speed $v$. If the wave is reflected off a surface, what is the frequency of the reflected wave?
A. f
B. 2f
C. f/2
D. f+v
Question 15
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 angular velocity of the particle?
A. 2 rad/s
B. 4 rad/s
C. 6 rad/s
D. 8 rad/s

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