POST UTME UNILAG 2025 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A parallel-plate capacitor has a capaci\tance of 10 μF and is charged to a potential difference of 12 V. If the dis\tance between the plates is doubled, what is the new capaci\tance?
A. 20 μF
B. 15 μF
C. 10 μF
D. 5 μF
Question 2
A liquid of density 800 kg/m^3 is flowing through a horizontal pipe of radius 0.05 m. The pressure difference between the two \ends of the pipe is 1000 Pa. What is the volume flow rate of the liquid?
A. 0.01 m^3/s
B. 0.02 m^3/s
C. 0.03 m^3/s
D. 0.04 m^3/s
Question 3
A sound wave has a frequency of 200 Hz and a speed of 340 m/s. If the wave is traveling through a medium with a density of 1.2 kg/m^3, what is the wavelength of the wave?
A. 0.17 m
B. 0.18 m
C. 0.19 m
D. 0.20 m
Question 4
A 5 kg block is moving with a velocity of 2 m/s. Calculate the kinetic energy of the block.
A. 10 J
B. 20 J
C. 30 J
D. 40 J
Question 5
A spring with a spring cons\tant of 100 N/m is stretched by 2 m from its equilibrium position. What is the potential energy stored in the spring?
A. 100 J
B. 200 J
C. 300 J
D. 400 J
Question 6
A 2 kg block of ice at 0°C is placed in a 10°C water bath. Assuming no heat loss to the surroundings, calculate the time it takes for the ice to melt completely.
A. 10 minutes
B. 20 minutes
C. 30 minutes
D. 40 minutes
Question 7
A 100 W bulb is connected to a 220 V power source. If the bulb is used for 5 hours a day, what is the total energy consumed by the bulb in a month?
A. 120 kWh
B. 150 kWh
C. 180 kWh
D. 200 kWh
Question 8
A wave of wavelength 0.5 m and frequency 10 Hz is propagating in a medium with speed 20 m/s. Determine the amplitude of the wave.
A. 0.1 m
B. 0.2 m
C. 0.3 m
D. 0.4 m
Question 9
A 10 Ω resistor is connected in parallel with a 20 Ω resistor. Calculate the equivalent resis\tance of the circuit.
A. 5 Ω
B. 10 Ω
C. 15 Ω
D. 20 Ω
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 angular velocity of the particle?
A. 2 rad/s
B. 4 rad/s
C. 6 rad/s
D. 8 rad/s
Question 11
A particle of mass 2 kg is moving in a circular path of radius 3 m with a speed of 4 m/s. Calculate the centripetal force acting on the particle.
A. 10 N
B. 20 N
C. 30 N
D. 40 N
Question 12
A particle of charge 5 C is moving with a velocity of 2 m/s in a magnetic field of strength 1 T. If the particle is subjected to a force of 10 N, what is the direction of the magnetic field?
A. Clockwise
B. Counterclockwise
C. Into the page
D. Out of the page
Question 13
A block of mass 5.0 kg is attached to a horizontal spring with a force cons\tant of 200 N/m. 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. 1.0 m/s
C. 1.5 m/s
D. 2.0 m/s
Question 14
A particle of mass 2 kg is moving in a circular path of radius 3 m with a speed of 4 m/s. What is the magnitude of the centripetal force acting on the particle?
A. 8 N
B. 12 N
C. 16 N
D. 20 N
Question 15
A 2 kg block is attached to a horizontal spring with a spring cons\tant of 100 N/m. If the block is displaced by 0.1 m from its equilibrium position, what is the magnitude of the force exerted by the spring on the block?
A. 10 N
B. 20 N
C. 30 N
D. 40 N

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