POST UTME CALEB UNIVERSITY 2023 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 10 Ω resistor is connected in series with a 20 Ω resistor and a 30 Ω resistor. If a 6 V battery is connected across the circuit, what is the current flowing through the 10 Ω resistor?
A. 0.2 A
B. 0.3 A
C. 0.4 A
D. 0.5 A
Question 2
A simple harmonic motion has a maximum displacement of 2 m and a period of 4 s. If the amplitude is increased to 3 m, calculate the new period of the motion.
A. 2 s
B. 4 s
C. 6 s
D. 8 s
Question 3
A heat engine operates between a temperature of 500 K and a temperature of 300 K. If the efficiency of the engine is 30%, calculate the work done by the engine per cycle.
A. 100 J
B. 200 J
C. 300 J
D. 400 J
Question 4
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 5
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 6
A parallel plate capacitor has plates of area 0.04 m^2 and separation 0.02 m. If the dielectric cons\tant of the material between the plates is 3, calculate the capaci\tance.
A. 0.01 F
B. 0.02 F
C. 0.03 F
D. 0.04 F
Question 7
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 8
A wave has a frequency of 50 Hz and a wavelength of 2 m. What is the speed of the wave?
A. 100 m/s
B. 200 m/s
C. 250 m/s
D. 300 m/s
Question 9
A particle of mass 1 kg is moving in a circular path of radius 2 m with a cons\tant speed of 3 m/s. If the particle is subjected to a centripetal force of 6 N, what is the magnitude of the acceleration of the particle?
A. 1 m/s^2
B. 2 m/s^2
C. 3 m/s^2
D. 4 m/s^2
Question 10
A 5 Ω resistor is connected in series with a 10 Ω resistor and a 20 V battery. U\sing Kirchhoff's voltage law, calculate the current flowing through the 5 Ω resistor.
A. 2 A
B. 4 A
C. 6 A
D. 8 A
Question 11
A 10 μF capacitor is connected in parallel with a 20 μF capacitor. If a 15 V battery is connected across the circuit, what is the equivalent capaci\tance of the circuit?
A. 10 μF
B. 15 μF
C. 20 μF
D. 30 μF
Question 12
A projectile is launched at an angle of 45° with an initial velocity of 20 m/s. If the acceleration due to gravity is 10 m/s^2, calculate the time of flight of the projectile.
A. 2 s
B. 4 s
C. 6 s
D. 8 s
Question 13
A particle is moving in a circular path with a cons\tant speed of 5 m/s. If the radius of the circle is 2 m, calculate the centripetal acceleration of the particle.
A. 10 m/s^2
B. 20 m/s^2
C. 30 m/s^2
D. 40 m/s^2
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. 25 Bq
B. 50 Bq
C. 75 Bq
D. 100 Bq
Question 15
A gas at 300 K expands from 1 L to 2 L against a cons\tant external pressure of 2 atm. Calculate the work done by the gas.
A. -1.2 kJ
B. -1.5 kJ
C. -1.8 kJ
D. -2.0 kJ

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