POST UTME LAUTECH 2022 Physics | Objective

Are you preparing for POST UTME LAUTECH exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2022 Physics (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
A parallel plate capacitor has plates of area 0.04 m^2 and separation 0.02 m. If the capaci\tance is 8.0 nF, what is the dielectric cons\tant of the material between the plates?
A. 1.0
Correct B. 2.0
C. 3.0
D. 4.0

Correct Answer: B

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Question 2
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. What is the magnitude of the net force acting on the particle?
A. 20 N
B. 30 N
Correct C. 40 N
D. 50 N

Correct Answer: C

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Question 3
A light ray passes from air into a glass slab of re\fractive index 1.5. If the angle of incidence is 30°, what is the angle of re\fraction?
A. 20°
Correct B. 30°
C. 40°
D. 50°

Correct Answer: B

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Question 4
A simple harmonic motion has a time period of 2.0 s and an amplitude of 3.0 m. What is the maximum acceleration of the particle?
A. 6.0 m/s^2
B. 12.0 m/s^2
Correct C. 18.0 m/s^2
D. 24.0 m/s^2

Correct Answer: C

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Question 5
A gas is heated from 300 K to 400 K at cons\tant volume. What is the ratio of the final volume to the initial volume?
A. 1.33
B. 1.5
Correct C. 1.67
D. 2.0

Correct Answer: C

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Question 6
A radioactive sample of Uranium-238 undergoes \alpha decay. If the initial mass of the sample is 100 g, and the mass of an \alpha particle is 4 u, what is the mass of the daughter nucleus after 10 half-lives?
A. 36 g
B. 40 g
Correct C. 44 g
D. 48 g

Correct Answer: C

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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. What is the magnitude of the net force acting on the particle?
A. 16 N
B. 20 N
Correct C. 24 N
D. 28 N

Correct Answer: C

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Question 8
A 100 W light bulb is connected to a 220 V power source. What is the current flowing through the bulb?
A. 0.45 A
Correct B. 0.50 A
C. 0.55 A
D. 0.60 A

Correct Answer: B

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Question 9
A heat engine operates between two reservoirs at temperatures 500 K and 300 K. If the engine absorbs 100 J of heat from the high-temperature reservoir, what is the efficiency of the engine?
A. 0.25
B. 0.30
Correct C. 0.35
D. 0.40

Correct Answer: C

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Question 10
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 60° above the horizontal. What is the maximum height reached by the projectile?
A. 10 m
B. 12 m
Correct C. 15 m
D. 18 m

Correct Answer: C

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Question 11
A parallel plate capacitor has plates of area 0.04 m^2 and separation 0.02 m. If the dielectric cons\tant of the material between the plates is 3, calculate the capaci\tance.
Correct A. 4.8 x 10^-10 F
B. 4.8 x 10^-11 F
C. 4.8 x 10^-12 F
D. 4.8 x 10^-13 F

Correct Answer: A

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Question 12
A particle of mass 2 kg is moving in a circular path of radius 3 m with a speed of 4 m/s. If the particle is subject to a centripetal force of 12 N, calculate the time taken for one complete revolution.
Correct A. 1.57 s
B. 1.57 x 10^2 s
C. 1.57 x 10^3 s
D. 1.57 x 10^4 s

Correct Answer: A

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Question 13
A ray of light passes from air into a glass of re\fractive index 1.5. If the angle of incidence is 30°, calculate the angle of re\fraction.
Correct A. 20°
B. 30°
C. 40°
D. 50°

Correct Answer: A

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Question 14
A 2 kg block is attached to a horizontal, massless spring with a force 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
Correct B. 4 m/s
C. 6 m/s
D. 8 m/s

Correct Answer: B

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Question 15
A parallel plate capacitor has plates of area 0.04 m^2 and separation 0.02 m. If the dielectric cons\tant of the material between the plates is 3, calculate the energy stored in the capacitor when a potential difference of 10 V is applied across it.
Correct A. 1.2 x 10^-7 J
B. 1.2 x 10^-8 J
C. 1.2 x 10^-9 J
D. 1.2 x 10^-10 J

Correct Answer: A

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Question 16
A beam of light passes through a prism and is re\fracted. If the angle of incidence is 30° and the angle of re\fraction is 20°, what is the angle of deviation?
A. 40°
B. 50°
Correct C. 60°
D. 70°

Correct Answer: C

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Question 17
A block of mass 2 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, what is the maximum speed of the block?
A. 1.0 m/s
Correct B. 2.0 m/s
C. 3.0 m/s
D. 4.0 m/s

Correct Answer: B

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Question 18
A radioactive sample has a half-life of 10 years. If the initial activity is 100 Bq, what is the activity after 20 years?
A. 10 Bq
Correct B. 20 Bq
C. 30 Bq
D. 40 Bq

Correct Answer: B

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Question 19
A heat engine operates between two reservoirs at temperatures 300 K and 400 K. If the engine absorbs 100 J of heat from the high-temperature reservoir, what is the efficiency of the engine?
A. 20%
Correct B. 30%
C. 40%
D. 50%

Correct Answer: B

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Question 20
A particle of mass 1 kg is moving in a circular path with a radius of 2 m. If the particle has a speed of 4 m/s, what is the centripetal acceleration?
A. 2 m/s^2
Correct B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2

Correct Answer: B

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Question 21
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/s², what is the magnitude of the force acting on the particle?
A. 10 N
Correct B. 12 N
C. 15 N
D. 18 N

Correct Answer: B

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Question 22
A light ray passes through a prism and is re\fracted at an angle of 30°. If the angle of incidence is 40°, what is the angle of re\fraction?
A. 20°
B. 25°
Correct C. 30°
D. 35°

Correct Answer: C

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Question 23
A 5 kg block is attached to a horizontal, massless spring with a force cons\tant of 200 N/m. If the block is displaced by 2 m from its equilibrium position and released from rest, what is 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 24
A parallel plate capacitor has a capaci\tance of 10 µF and is charged to a potential difference of 100 V. If the plates are separated by a dis\tance of 2 mm, what is the surface charge density?
A. 10 µC/m²
B. 20 µC/m²
Correct C. 30 µC/m²
D. 40 µC/m²

Correct Answer: C

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Question 25
A photon has an energy of 2 eV and a momentum of 10²² kg m/s. What is the wavelength of the photon?
A. 10²² m
Correct B. 20²² m
C. 30²² m
D. 40²² m

Correct Answer: B

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