POST UTME LEAD CITY UNIVERSITY 2021 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A gas expands from 1.0 L to 2.0 L against a cons\tant external pressure of 1.0 atm. What is the work done by the gas?
A. 1.0 L atm
B. 2.0 L atm
C. 3.0 L atm
D. 4.0 L atm
Question 2
A particle of mass 0.5 kg is moving in a circular path of radius 2 m with a speed of 4 m/s. What is the magnitude of the centripetal acceleration?
A. 0.5 m/s^2
B. 1.0 m/s^2
C. 2.0 m/s^2
D. 4.0 m/s^2
Question 3
In a double-slit experiment, a beam of light passes through two parallel slits, creating an interference pattern on a screen. If the dis\tance between the slits is 0.5 mm and the wavelength of the light is 500 nm, calculate the fringe width.
A. 1.0 mm
B. 0.5 mm
C. 2.0 mm
D. 1.5 mm
Question 4
A ray of light passes from air into a glass block 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 5
A 1000 Ω resistor is connected in series with a 200 V battery. If the internal resis\tance of the battery is 10 Ω, what is the current flowing through the circuit?
A. 0.2 A
B. 0.25 A
C. 0.3 A
D. 0.35 A
Question 6
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 subject to a centripetal force of 12 N, what is the magnitude of the force?
A. 8 N
B. 12 N
C. 16 N
D. 20 N
Question 7
A wave of frequency 50 Hz and wavelength 0.2 m is traveling through a medium. If the wave is reflected from a fixed \end, what is the frequency of the reflected wave?
A. 50 Hz
B. 100 Hz
C. 150 Hz
D. 200 Hz
Question 8
A wave has a frequency of 50 Hz and a wavelength of 10 m. What is its velocity?
A. 500 m/s
B. 5000 m/s
C. 50000 m/s
D. 500000 m/s
Question 9
A gas is contained in a cylinder of volume 2.5 L at a pressure of 2.0 atm. If the temperature is increased by 20°C, calculate the new pressure of the gas.
A. 2.5 atm
B. 3.0 atm
C. 4.0 atm
D. 1.5 atm
Question 10
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 11
A car of mass 1500 kg is traveling at a speed of 25 m/s. If the car is brought to rest in 4 s, what is the magnitude of the force applied to the car?
A. 3750 N
B. 4500 N
C. 5250 N
D. 6000 N
Question 12
A particle of mass 1 kg is moving in a straight line with a cons\tant acceleration of 2 m/s^2. If the particle's initial velocity is 4 m/s, what is its velocity after 3 seconds?
A. 6 m/s
B. 8 m/s
C. 10 m/s
D. 12 m/s
Question 13
A wave function is given by ψ(x) = A \sin(kx). What is the value of k?
A. 1.0 m^-1
B. 2.0 m^-1
C. 3.0 m^-1
D. 4.0 m^-1
Question 14
A wave has a frequency of 50 Hz and a wavelength of 0.2 m. If the wave is traveling in the positive x-direction, what is the direction of the wave's velocity?
A. Positive x-direction
B. Negative x-direction
C. Positive y-direction
D. Negative y-direction
Question 15
A force of 10 N is applied to an object of mass 5 kg. What is the acceleration of the object?
A. 0.5 m/s^2
B. 1 m/s^2
C. 2 m/s^2
D. 5 m/s^2

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