POST UTME EKSU 2023 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A beam of light passes from air into a medium with a re\fractive index of 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 2
A block of mass 5 kg is placed on a horizontal surface. A horizontal force of 20 N is applied to the block. If the coefficient of kinetic friction between the block and the surface is 0.2, calculate the acceleration of the block.
A. 0.5 m/s^2
B. 1 m/s^2
C. 2 m/s^2
D. 3 m/s^2
Question 3
A circuit consists of a 10 Ω resistor, a 20 Ω resistor, and a 5 Ω resistor connected in series. A 12 V battery is connected across the circuit. Calculate the current flowing through the 5 Ω resistor.
A. 0.4 A
B. 0.6 A
C. 0.8 A
D. 1.2 A
Question 4
A light ray passes through a prism of angle 60° and is re\fracted at an angle of 30°. If the angle of incidence is 45°, what is the angle of emergence?
A. 60°
B. 70°
C. 80°
D. 90°
Question 5
A 10 kg object is moving in a circular path with a radius of 5 m. If the object's speed is 20 m/s, calculate the centripetal acceleration.
A. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2
Question 6
A wave has a frequency of 20 Hz and a wavelength of 0.5 m. Calculate the speed of the wave.
A. 10 m/s
B. 20 m/s
C. 40 m/s
D. 80 m/s
Question 7
A 2 kg object is moving in a circular path with a radius of 3 m. If the object's speed is 15 m/s, calculate the centripetal force.
A. 30 N
B. 60 N
C. 90 N
D. 120 N
Question 8
A particle of mass 2 kg is projected from the origin with an initial velocity of 20 m/s at an angle of 60° above the horizontal. Assuming the acceleration due to gravity is 9.8 m/s², calculate the time taken for the particle to reach its maximum height.
A. 1.5 s
B. 2.0 s
C. 2.5 s
D. 3.0 s
Question 9
A magnetic field of 0.5 T is applied to a current-carrying wire. If the current is 2.0 A, what is the force on the wire?
A. 0.5 N
B. 1.0 N
C. 1.5 N
D. 2.0 N
Question 10
A radioactive sample decays from 100 g to 50 g in 10 years. Calculate the half-life of the sample.
A. 5 years
B. 10 years
C. 15 years
D. 20 years
Question 11
A 5 kg object is moving in a straight line with a velocity of 10 m/s. If the object experiences a force of 20 N, calculate the acceleration.
A. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2
Question 12
A capacitor consists of two parallel plates, each of area 0.1 m², separated by a dis\tance of 0.01 m. If the capaci\tance is 10 μF, what is the charge stored on each plate when a potential difference of 5 V is applied?
A. 50 μC
B. 100 μC
C. 150 μC
D. 200 μC
Question 13
A wave of amplitude 0.5 m and frequency 5 Hz is traveling along a string. Calculate the wavelength of the wave.
A. 0.1 m
B. 0.2 m
C. 0.3 m
D. 0.4 m
Question 14
A radioactive sample has a half-life of 5 years. If the initial activity is 100 Bq, what is the activity after 10 years?
A. 50 Bq
B. 25 Bq
C. 12.5 Bq
D. 6.25 Bq
Question 15
A simple harmonic motion has a maximum displacement of 5 cm and a time period of 2 s. If the motion starts from its mean position, what is the equation of motion?
A. x(t) = 5 \sin\( \pi t \)
B. x(t) = 5 \sin\( 2\pi t \)
C. x(t) = 5 \sin\( \pi t + \frac{\pi}{2} \)
D. x(t) = 5 \sin\( 2\pi t + \frac{\pi}{2} \)

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