POST UTME AFE BABALOLA UNIVERSITY 2018 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A wave has a frequency of 50 Hz and a wavelength of 2 m. If the wave is traveling in a medium with a speed of 100 m/s, calculate the amplitude of the wave.
A. 0.05 m
B. 0.1 m
C. 0.2 m
D. 0.5 m
Question 2
A ray of light passes from air into a glass slab of re\fractive index $\mu$. If the angle of incidence is $30^\circ$, what is the angle of re\fraction?
A. 20^\circ
B. 30^\circ
C. 40^\circ
D. 50^\circ
Question 3
A particle of mass 2 kg is moving in a circular path of radius 3 m with a speed of 4 m/s. Find the magnitude of the force acting on the particle.
A. 10 N
B. 20 N
C. 30 N
D. 40 N
Question 4
A gas is contained in a cylinder of volume 10 L at a temperature of 300 K. If the gas is heated to a temperature of 400 K, what is the new volume?
A. 10 L
B. 13.33 L
C. 16.67 L
D. 20 L
Question 5
A beam 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 6
A particle of mass 1 kg is moving in a circular path of radius 2 m with a speed of 4 m/s. Determine the centripetal force acting on the particle.
A. 10 N
B. 20 N
C. 5 N
D. 15 N
Question 7
A body of mass 2 kg is moving with a velocity of 5 m/s. What is its kinetic energy?
A. 10 J
B. 20 J
C. 25 J
D. 30 J
Question 8
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. 5.33 m/s^2
B. 6.67 m/s^2
C. 7.78 m/s^2
D. 8.89 m/s^2
Question 9
A block of mass $m$ is placed on a frictionless surface and attached to a horizontal spring of spring cons\tant $k$. If the block is displaced by a dis\tance $x$ from its equilibrium position and released, what is the magnitude of the force acting on the block at that ins\tant?
A. kx
B. \frac{kx}{m}
C. \frac{mx}{k}
D. \frac{km}{x}
Question 10
A sound wave has a frequency of 200 Hz and a wavelength of 1.5 m. Find the speed of the sound wave.
A. 300 m/s
B. 400 m/s
C. 500 m/s
D. 600 m/s
Question 11
A radioactive sample has a half-life of 10 years. If the initial activity is 100 Bq, what is the activity after 20 years?
A. 25 Bq
B. 50 Bq
C. 75 Bq
D. 100 Bq
Question 12
A beam of light passes from air into a glass of re\fractive index 1.5. If the angle of incidence is 30°, determine the angle of re\fraction.
A. 20°
B. 25°
C. 15°
D. 30°
Question 13
A 10 Ω resistor is connected in series with a 20 Ω resistor and a 30 Ω resistor. If a potential difference of 12 V is applied across the circuit, what is the current flowing through the 10 Ω resistor?
A. 0.2 A
B. 0.4 A
C. 0.6 A
D. 0.8 A
Question 14
A parallel plate capacitor has a capaci\tance of 10 μF and is charged to a potential difference of 12 V. If a dielectric slab of thickness 2 mm and dielectric cons\tant 4 is inserted between the plates, what is the new capaci\tance?
A. 8 μF
B. 12 μF
C. 16 μF
D. 20 μF
Question 15
A ray of light passes from air into a glass slab of re\fractive index $\mu$. If the angle of incidence is $30^\circ$, what is the angle of re\fraction?
A. 20^\circ
B. 30^\circ
C. 40^\circ
D. 50^\circ

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