POST UTME CRAWFORD UNIVERSITY 2023 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. If the circuit is closed, what is the current flowing through the 4 Ω resistor?
A. 1 A
B. 2 A
C. 3 A
D. 4 A
Question 2
A particle of mass 2 kg is moving in a circular path with a radius of 2 m. If it has a velocity of 4 m/s, calculate the centripetal force.
A. 8 N
B. 16 N
C. 32 N
D. 64 N
Question 3
A container is filled with water to a height of 10 cm. What is the pressure at the bottom of the container?
A. 1000 Pa
B. 2000 Pa
C. 3000 Pa
D. 4000 Pa
Question 4
A radioactive sample has a half-life of 5 years. If the initial activity of the sample is 100 Bq, what is the activity of the sample after 10 years?
A. 12.5 Bq
B. 25 Bq
C. 37.5 Bq
D. 50 Bq
Question 5
A gas is compressed from 1 m^3 to 0.5 m^3 at cons\tant pressure. If the initial temperature is 300 K, calculate the final temperature.
A. 600 K
B. 800 K
C. 1000 K
D. 1200 K
Question 6
A beam of light is incident on a glass surface at an angle of 45°. If the re\fractive index of the glass is 1.5, calculate the angle of re\fraction.
A. 30°
B. 40°
C. 50°
D. 60°
Question 7
A gas is enclosed in a container with a movable piston. The gas is heated at cons\tant pressure, cau\sing its volume to increase. What is the direction of the work done by the gas?
A. Positive
B. Negative
C. Zero
D. Dep\ends on the initial volume
Question 8
A 12 V battery is connected in series with a 4 Ω resistor and a 6 Ω resistor. What is the current flowing through the 4 Ω resistor?
A. 0.5 A
B. 1 A
C. 1.5 A
D. 2 A
Question 9
A particle of mass 2 kg is attached to a spring with a spring cons\tant of 100 N/m. It is displaced by 0.5 m from its equilibrium position and released from rest. Assuming the motion is simple harmonic, calculate the total energy of the particle at t = 0.
A. 12.5 J
B. 25 J
C. 50 J
D. 100 J
Question 10
A wave has a frequency of 100 Hz and a wavelength of 0.5 m. Calculate the speed of the wave.
A. 20 m/s
B. 30 m/s
C. 40 m/s
D. 50 m/s
Question 11
A gas is heated from 300 K to 400 K at cons\tant volume. If the initial pressure is 1 atm, calculate the final pressure.
A. 1.33 atm
B. 2 atm
C. 3 atm
D. 4 atm
Question 12
A capacitor of capaci\tance 10 μF is connected to a battery of voltage 12 V. If the capacitor is initially uncharged, what is the charge on the capacitor after 2 seconds?
A. 100 μC
B. 120 μC
C. 150 μC
D. 200 μC
Question 13
A particle of mass 3 kg is moving in a circular path with a radius of 3 m. If it has a velocity of 6 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 14
A wave has a frequency of 60 Hz and a wavelength of 0.3 m. If the wave is traveling in the positive x-direction, what is the speed of the wave?
A. 18 m/s
B. 20 m/s
C. 22 m/s
D. 24 m/s
Question 15
A light ray 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°

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