POST UTME AFE BABALOLA UNIVERSITY 2021 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in series. What is the current in the circuit?
A. 1 A
B. 2 A
C. 3 A
D. 4 A
Question 2
A block of mass $m$ is placed on a frictionless surface and connected to a horizontal spring with spring cons\tant $k$. The block is displaced from its equilibrium position by a dis\tance $x$ and released from rest. What is the angular frequency of the resulting simple harmonic motion?
A. k/m
B. √\( k/m \)
C. k√m
D. m√k
Question 3
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. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2
Question 4
A body 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 body is subjected to a centripetal force of 12 N, what is the work done by the centripetal force in moving the body through a dis\tance of 10 m?
A. 60 J
B. 80 J
C. 100 J
D. 120 J
Question 5
A wave has a frequency of 50 Hz and a wavelength of 0.2 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 6
A charged particle of mass $m$ and charge $q$ is moving in a uniform magnetic field $B$. If the particle is moving with a speed $v$ perp\endicular to the magnetic field, what is the force acting on the particle?
A. \( qvB \)
B. \( qv^2B \)
C. \( qvB^2 \)
D. \( qv^2B^2 \)
Question 7
A parallel plate capacitor has a capaci\tance of 10 μF and is charged to a potential difference of 12 V. If the plates are then separated by a dis\tance of 5 mm, what is the new capaci\tance?
A. 20 μF
B. 15 μF
C. 10 μF
D. 5 μF
Question 8
A beam of light is incident on a prism at an angle of incidence of 30°. The re\fractive index of the prism is 1.5. What is the angle of re\fraction?
A. 20°
B. 30°
C. 40°
D. 50°
Question 9
A 100 W light bulb is connected to a 220 V AC source. What is the current flowing through the bulb?
A. 0.5 A
B. 1 A
C. 2 A
D. 4 A
Question 10
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 11
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 12
A block of mass 5 kg is moving with a velocity of 2 m/s on a frictionless surface. If a force of 10 N is applied to the block, what is the acceleration of the block?
A. 1 m/s^2
B. 2 m/s^2
C. 3 m/s^2
D. 4 m/s^2
Question 13
A block of mass 5 kg is attached to a horizontal spring with a force cons\tant of 200 N/m. If the block is displaced by 0.1 m from its equilibrium position and released from rest, what is the maximum speed of the block?
A. 0.5 m/s
B. 1 m/s
C. 1.5 m/s
D. 2 m/s
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 light ray passes from air into a glass slab 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°

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