POST UTME CHRISTOPHER UNIVERSITY 2024 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 2.0 kg object is attached to a horizontal, massless string and rotated in a circle with a radius of 1.5 m. The object is moving at a speed of 4.0 m/s. Calculate the centripetal acceleration of the object.
A. 2.0 m/s^2
B. 4.0 m/s^2
C. 6.0 m/s^2
D. 8.0 m/s^2
Question 2
A 10 V battery is connected in parallel with a 20 Ω resistor and a 30 Ω resistor. What is the current through the 20 Ω resistor?
A. 0.5 A
B. 0.6 A
C. 0.7 A
D. 0.8 A
Question 3
A light ray passes through a convex lens of focal length f. If the object dis\tance is 2f, what is the image dis\tance?
A. f
B. 2f
C. 3f
D. 4f
Question 4
A 1000 Hz sound wave has a speed of 340 m/s. What is the frequency of the sound wave?
A. 150 Hz
B. 200 Hz
C. 250 Hz
D. 300 Hz
Question 5
A particle of mass 2 kg is moving in a circular path of radius 3 m with a speed of 4 m/s. If the particle is subject to a centripetal force of 10 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
Question 6
A 1000 Hz sound wave has a speed of 400 m/s. Calculate the wavelength of the sound wave.
A. 0.40 m
B. 0.50 m
C. 0.60 m
D. 0.70 m
Question 7
A 1000 Hz sound wave has a wavelength of 0.50 m. Calculate the frequency of the sound wave.
A. 1000 Hz
B. 2000 Hz
C. 3000 Hz
D. 4000 Hz
Question 8
A gas is enclosed in a cylinder of volume 0.05 m^3. The gas is heated from 300 K to 400 K. If the initial pressure is 100 kPa, what is the final pressure of the gas?
A. 120 kPa
B. 150 kPa
C. 180 kPa
D. 200 kPa
Question 9
A particle of mass $m$ is confined to a one-dimensional box of length $L$. The wave function of the particle is given by $psi(x) = \sqrt{\frac{2}{L}} \sinleft\( \frac{npi x}{L}\right \)$, where $n$ is a positive integer. What is the expectation value of the position operator $hat{x}$ in the state $psi(x)$?
A. 0
B. \frac{L}{2}
C. L
D. \frac{n\pi L}{2}
Question 10
A 20 Ω resistor is connected in series with a 30 Ω resistor and a 40 Ω resistor. What is the total resis\tance?
A. 90 Ω
B. 100 Ω
C. 110 Ω
D. 120 Ω
Question 11
A 10 V battery is connected to a 2 ohm resistor. Calculate the current drawn by the resistor.
A. 0.5 A
B. 1 A
C. 2 A
D. 5 A
Question 12
A 100 W light bulb is connected to a 120 V power source. Calculate the current flowing through the light bulb.
A. 0.5 A
B. 1.0 A
C. 1.5 A
D. 2.0 A
Question 13
A 1000 kg car is traveling at 20 m/s when the brakes are applied. If the car is brought to rest in 4 s, what is the average force exerted on the car?
A. 2500 N
B. 5000 N
C. 7500 N
D. 10000 N
Question 14
A sound wave with frequency f and amplitude A is reflected from a rigid wall. What is the amplitude of the reflected wave?
A. 0.1 m
B. 0.2 m
C. 0.3 m
D. 0.4 m
Question 15
A 1000 Hz sound wave has a wavelength of 0.50 m. Calculate the speed of the sound wave.
A. 200 m/s
B. 400 m/s
C. 600 m/s
D. 800 m/s

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