POST UTME UNN 2025 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A car is traveling at a speed of 30 m/s when it encounters a curve with a radius of 50 m. If the car is subject to a centripetal force of 500 N, what is the magnitude of the acceleration of the car?
A. 10 m/s^2
B. 20 m/s^2
C. 30 m/s^2
D. 40 m/s^2
Question 2
A 100 W light bulb is connected to a 120 V power source. If the resis\tance of the bulb is 10 Ω, calculate the current flowing through the bulb.
A. 0.5 A
B. 1 A
C. 2 A
D. 5 A
Question 3
A block of mass 5 kg is attached to a horizontal spring with a spring cons\tant of 20 N/m. If the block is displaced by 0.2 m from its equilibrium position and released from rest, what is the maximum speed of the block?
A. 0.5 m/s
B. 1 m/s
C. 2 m/s
D. 4 m/s
Question 4
A charged particle of mass 1 kg and charge 2 C is moving in a magnetic field of strength 5 T. If the particle is moving at a speed of 3 m/s, what is the magnitude of the force acting on the particle?
A. 10 N
B. 12 N
C. 15 N
D. 20 N
Question 5
A wave has a frequency of 50 Hz and a wavelength of 0.5 m. What is the speed of the wave?
A. 25 m/s
B. 50 m/s
C. 100 m/s
D. 200 m/s
Question 6
A 50 Hz AC generator produces an emf given by \( varepsilon = 120 \sin \( 2 pi ft \ \) ) V, where ( f ) is the frequency in Hz. Determine the maximum value of the emf.
A. 60 V
B. 120 V
C. 180 V
D. 240 V
Question 7
A beam of light passes through a prism and is re\fracted at an angle of 30°. If the angle of incidence is 20°, calculate the angle of re\fraction.
A. 25°
B. 30°
C. 35°
D. 40°
Question 8
A heat engine operates between two temperatures, 300 K and 500 K. If the efficiency of the engine is 30%, what is the temperature of the hot reservoir?
A. 400 K
B. 450 K
C. 500 K
D. 550 K
Question 9
A gas is enclosed in a container with a movable piston. The gas is heated, cau\sing its pressure to increase. If the piston is allowed to move freely, what will happen to the volume of the gas?
A. The volume of the gas will decrease.
B. The volume of the gas will increase.
C. The volume of the gas will remain cons\tant.
D. The volume of the gas will decrease and then increase.
Question 10
A capacitor consists of two parallel plates separated by a dis\tance of 2 mm. If the capaci\tance of the capacitor is 10 μF, what is the charge stored on the capacitor when a potential difference of 5 V is applied across it?
A. 50 μC
B. 60 μC
C. 70 μC
D. 80 μC
Question 11
A particle of mass 2 kg is projected from the origin with an initial velocity of 20 m/s at an angle of 60° to the horizontal. Assuming a cons\tant acceleration of 2 m/s² due to gravity, determine the time taken for the particle to reach its maximum height.
A. 1.5 s
B. 2.0 s
C. 2.5 s
D. 3.0 s
Question 12
A circuit consists of a 10 Ω resistor and a 20 Ω resistor connected in series. A voltage of 20 V is applied across the circuit. Determine the current flowing through the circuit.
A. 0.5 A
B. 1.0 A
C. 1.5 A
D. 2.0 A
Question 13
A 100 W light bulb is connected to a 220 V AC source. What is the current drawn by the bulb?
A. 0.4 A
B. 0.5 A
C. 0.6 A
D. 0.7 A
Question 14
A 5 kg block is moving with a velocity of 2 m/s on a frictionless surface. What is the kinetic energy of the block?
A. 10 J
B. 20 J
C. 30 J
D. 40 J
Question 15
A 50 Hz AC voltage is applied across a 10 Ω resistor. If the current is 2 A, what is the power consumed by the resistor?
A. 100 W
B. 200 W
C. 400 W
D. 600 W

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