POST UTME AL-HIKMAH UNIVERSITY 2023 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A heat engine operates between two temperatures of 300 K and 400 K. If the efficiency of the engine is 30%, what is the work done by the engine per cycle?
A. 100 J
B. 200 J
C. 300 J
D. 400 J
Question 2
A projectile is launched at an angle of 30° with an initial velocity of 20 m/s. If the air resis\tance is negligible, what is the maximum height reached by the projectile?
A. 10 m
B. 15 m
C. 20 m
D. 25 m
Question 3
A gas is contained in a cylinder of volume 0.05 m^3 at a pressure of 1.5 x 10^5 Pa. If the temperature of the gas is increased by 20 K, what is the new pressure of the gas?
A. 1.8 x 10^5 Pa
B. 2.1 x 10^5 Pa
C. 2.4 x 10^5 Pa
D. 2.7 x 10^5 Pa
Question 4
A block of mass 5 kg is placed on a frictionless surface and attached to a horizontal spring with a force cons\tant of 100 N/m. If the block is displaced by 2 m from its equilibrium position and released, what is the maximum speed of the block?
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s
Question 5
A photon of wavelength 500 nm is incident on a metal surface. If the work function of the metal is 2 eV, what is the maximum kinetic energy of the emitted electron?
A. 1 eV
B. 2 eV
C. 3 eV
D. 4 eV
Question 6
A gas occupies a volume of 2 L at a pressure of 1 atm. If the temperature is increased by 10°C, what is the new volume of the gas?
A. 2.5 L
B. 3 L
C. 3.5 L
D. 4 L
Question 7
A current of 2 A flows through a resistor of 10 Ω. What is the power dissipated by the resistor?
A. 20 W
B. 40 W
C. 60 W
D. 80 W
Question 8
A force of 10 N acts on an object, cau\sing it to accelerate at 2 m/s^2. What is the mass of the object?
A. 5 kg
B. 10 kg
C. 20 kg
D. 50 kg
Question 9
A beam 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. 15°
B. 20°
C. 25°
D. 30°
Question 10
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. 10 m/s^2
B. 12 m/s^2
C. 15 m/s^2
D. 20 m/s^2
Question 11
A particle is projected from the origin with an initial velocity of 20 m/s at an angle of 60° above the horizontal. What is the time of flight of the particle?
A. 2.5 s
B. 3.0 s
C. 3.5 s
D. 4.0 s
Question 12
A spring with a spring cons\tant of 100 N/m is stretched by 2 m. What is the work done in stretching the spring?
A. 100 J
B. 200 J
C. 300 J
D. 400 J
Question 13
A heat engine operates between two temperatures of 500 K and 300 K. What is the efficiency of the engine?
A. 0.25
B. 0.33
C. 0.40
D. 0.50
Question 14
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 acceleration of 2 m/s^2, what is the magnitude of the force acting on the particle?
A. 8 N
B. 10 N
C. 12 N
D. 16 N
Question 15
A capacitor consists of two parallel plates, each of area 0.04 m^2, separated by a dis\tance of 0.02 m. If the capaci\tance of the capacitor is 8 x 10^-6 F, what is the charge stored on the capacitor when a potential difference of 12 V is applied across it?
A. 96 x 10^-6 C
B. 192 x 10^-6 C
C. 288 x 10^-6 C
D. 384 x 10^-6 C

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