POST UTME OAU 2024 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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. 6 m/s^2
B. 12 m/s^2
C. 18 m/s^2
D. 24 m/s^2
Question 2
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. 25°
C. 30°
D. 35°
Question 3
A projectile is launched at an angle of 45° with an initial velocity of 10 m/s. If the air resis\tance is negligible, what is the maximum height reached by the projectile?
A. 2 m
B. 3 m
C. 4 m
D. 5 m
Question 4
A heat engine operates between a high-temperature reservoir at 500 K and a low-temperature reservoir at 300 K. What is the maximum efficiency of the engine?
A. 0.25
B. 0.33
C. 0.40
D. 0.50
Question 5
A wave of frequency 100 Hz and amplitude 2 m is traveling through a medium with a speed of 300 m/s. What is the wavelength of the wave?
A. 3 m
B. 4 m
C. 5 m
D. 6 m
Question 6
A capacitor ( C ) is connected to a battery of voltage ( V ). Find the charge ( Q ) stored on the capacitor.
A. Q = CV
B. Q = \frac{V}{C}
C. Q = \frac{C}{V}
D. Q = \frac{V}{C^2}
Question 7
A photon of energy 2 eV is incident on a metal surface. If the work function of the metal is 1 eV, what is the maximum kinetic energy of the emitted electron?
A. 0.5 eV
B. 1 eV
C. 1.5 eV
D. 2 eV
Question 8
A heat engine operates between two temperatures, 300 K and 400 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 9
A particle of mass 2 kg is moving in a circular path with a cons\tant speed of 4 m/s. If the radius of the path is 3 m, calculate the magnitude of the force acting on the particle.
A. 12 N
B. 16 N
C. 20 N
D. 24 N
Question 10
A particle of mass ( m ) is attached to a spring with spring cons\tant ( k ). The particle is displaced by a dis\tance ( x ) from its equilibrium position and released from rest. Assuming the motion is simple harmonic, find the angular frequency ( omega ) of the particle's motion.
A. \omega = \frac{k}{m}
B. \omega = \sqrt{\frac{m}{k}}
C. \omega = \frac{m}{k}
D. \omega = \sqrt{\frac{k}{m}}
Question 11
A capacitor consists of two parallel plates, each of area 0.1 m^2, separated by a dis\tance of 0.01 m. If the capaci\tance is 10^-6 F, calculate the charge stored on the plates when a potential difference of 10 V is applied.
A. 10^-7 C
B. 10^-6 C
C. 10^-5 C
D. 10^-4 C
Question 12
A wave has a frequency of 50 Hz and a wavelength of 10 m. Calculate the speed of the wave.
A. 500 m/s
B. 1000 m/s
C. 1500 m/s
D. 2000 m/s
Question 13
A 100 W light bulb is connected to a 220 V power source. If the resis\tance of the light bulb is 50 Ω, calculate the current flowing through the light bulb.
A. 2 A
B. 4 A
C. 6 A
D. 8 A
Question 14
A block of mass 5 kg is attached to a horizontal, massless spring with a force cons\tant of 200 N/m. The block is displaced by 2 m from its equilibrium position and released from rest. What is the maximum speed of the block?
A. 4 m/s
B. 6 m/s
C. 8 m/s
D. 10 m/s
Question 15
A magnetic field of 0.5 T is applied to a current-carrying wire of length 2 m. If the current is 5 A, what is the force on the wire?
A. 0.5 N
B. 1 N
C. 2 N
D. 5 N

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