POST UTME COAL CITY UNIVERSITY 2024 Physics | Objective

Are you preparing for POST UTME COAL CITY UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2024 Physics (Objective) questions designed to simulate the real exam environment.

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Question 1
A thermodynamic system undergoes a process from state A to state B. If the system's internal energy increases by 100 J and the work done on the system is 50 J, what is the change in the system's entropy?
A. 0.5 J/K
Correct B. 1 J/K
C. 2 J/K
D. 5 J/K

Correct Answer: B

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Question 2
A 100 V, 50 Hz AC source is connected to a 20 Ω resistor. If the current through the resistor is 2 A, what is the power consumed by the resistor?
A. 200 W
Correct B. 400 W
C. 600 W
D. 800 W

Correct Answer: B

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Question 3
A convex lens of focal length 20 cm is placed in contact with a concave lens of focal length -15 cm. What is the focal length of the combined lens?
A. 10 cm
B. 15 cm
Correct C. 20 cm
D. 25 cm

Correct Answer: C

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Question 4
A particle of mass 2 kg is moving in a circular path of radius 5 m with a speed of 10 m/s. What is the magnitude of the centripetal force acting on the particle?
A. 20 N
Correct B. 40 N
C. 60 N
D. 80 N

Correct Answer: B

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Question 5
A gas is heated from 300 K to 400 K at cons\tant volume. What is the change in the gas's internal energy?
A. 100 J
B. 200 J
Correct C. 300 J
D. 400 J

Correct Answer: C

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Question 6
A beam of light is incident on a glass slab at an angle of 30°. If the re\fractive index of glass is 1.5, calculate the angle of re\fraction u\sing Snell's law.
Correct A. 18°
B. 20°
C. 22°
D. 25°

Correct Answer: A

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Question 7
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. Calculate the magnitude of the centripetal force acting on the particle.
A. 10 N
B. 12 N
Correct C. 15 N
D. 20 N

Correct Answer: C

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Question 8
A gas is heated from 300 K to 400 K at cons\tant volume. Calculate the change in internal energy of the gas.
A. 100 J
B. 200 J
Correct C. 300 J
D. 400 J

Correct Answer: C

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Question 9
A lens of focal length 20 cm is used to form an image of an object placed 30 cm away from the lens. Calculate the magnification of the lens.
A. 0.5
Correct B. 1
C. 1.5
D. 2

Correct Answer: B

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Question 10
A photon of energy 2 eV is incident on a metal surface. If the work function of the metal is 1 eV, calculate the maximum kinetic energy of the emitted electron.
A. 1 eV
B. 1.5 eV
Correct C. 2 eV
D. 2.5 eV

Correct Answer: C

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Question 11
A sound wave with a frequency of 200 Hz is produced by a source moving towards a stationary observer. If the speed of sound in air is 343 m/s, calculate the apparent frequency heard by the observer.
A. 220 Hz
Correct B. 240 Hz
C. 260 Hz
D. 280 Hz

Correct Answer: B

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Question 12
A gas is heated from 300 K to 400 K at cons\tant volume. If the initial pressure is 1 atm, calculate the final pressure.
A. 1.33 atm
B. 1.5 atm
Correct C. 1.67 atm
D. 2 atm

Correct Answer: C

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Question 13
A block of mass 5 kg is attached to a horizontal spring with a spring cons\tant of 100 N/m. If the block is displaced by 0.2 m from its equilibrium position and released from rest, calculate the maximum speed of the block.
A. 2 m/s
B. 4 m/s
Correct C. 6 m/s
D. 8 m/s

Correct Answer: C

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Question 14
A sound wave with a frequency of 500 Hz is produced by a source moving away from a stationary observer. If the speed of sound in air is 343 m/s, calculate the apparent frequency heard by the observer.
A. 400 Hz
B. 420 Hz
Correct C. 440 Hz
D. 460 Hz

Correct Answer: C

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Question 15
A gas is compressed from 1 L to 0.5 L at cons\tant temperature. If the initial pressure is 2 atm, calculate the final pressure.
A. 4 atm
Correct B. 6 atm
C. 8 atm
D. 10 atm

Correct Answer: B

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Question 16
A particle of mass 2.0 kg is moving in a circular path of radius 3.0 m with a cons\tant speed of 4.0 m/s. If the particle is subject to a centripetal force of 12 N, what is the magnitude of the acceleration of the particle?
A. 2.0 m/s^2
B. 4.0 m/s^2
Correct C. 6.0 m/s^2
D. 8.0 m/s^2

Correct Answer: C

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Question 17
A gas is contained in a cylinder of volume 2.0 L at a pressure of 1.0 atm. If the temperature is increased by 10°C, what is the new pressure of the gas?
A. 1.2 atm
Correct B. 1.5 atm
C. 2.0 atm
D. 2.5 atm

Correct Answer: B

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Question 18
A beam of light passes through a prism and is re\fracted at an angle of 30°. If the angle of incidence is 20°, what is the angle of re\fraction?
A. 20°
B. 30°
Correct C. 40°
D. 50°

Correct Answer: C

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Question 19
A particle of mass 1.0 kg is moving in a circular path of radius 2.0 m with a cons\tant speed of 3.0 m/s. If the particle is subject to a centripetal force of 6.0 N, what is the magnitude of the acceleration of the particle?
A. 1.0 m/s^2
Correct B. 2.0 m/s^2
C. 3.0 m/s^2
D. 4.0 m/s^2

Correct Answer: B

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Question 20
A gas is contained in a cylinder of volume 1.0 L at a pressure of 2.0 atm. If the temperature is increased by 20°C, what is the new pressure of the gas?
A. 2.5 atm
B. 3.0 atm
Correct C. 3.5 atm
D. 4.0 atm

Correct Answer: C

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Question 21
A 1000 Hz sound wave is traveling through a medium with a speed of 343 m/s. What is the wavelength of the sound wave?
Correct A. 1.43 m
B. 0.71 m
C. 2.86 m
D. 3.43 m

Correct Answer: A

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Question 22
A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in series. What is the total resis\tance of the circuit?
A. 10 Ω
Correct B. 12 Ω
C. 8 Ω
D. 16 Ω

Correct Answer: B

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Question 23
A body is heated from 20°C to 80°C. What is the change in temperature?
Correct A. 60°C
B. 40°C
C. 80°C
D. 20°C

Correct Answer: A

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Question 24
A 2 kg block is attached to a horizontal spring with a force cons\tant of 100 N/m. The block is displaced by 0.5 m from its equilibrium position and released. What is the maximum speed of the block?
A. 2 m/s
Correct B. 4 m/s
C. 6 m/s
D. 8 m/s

Correct Answer: B

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Question 25
A 1000 Hz sound wave is traveling through a medium with a speed of 343 m/s. What is the frequency of the sound wave?
Correct A. 1000 Hz
B. 2000 Hz
C. 3000 Hz
D. 4000 Hz

Correct Answer: A

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