POST UTME NOUN 2023 Physics | Objective

Are you preparing for POST UTME NOUN exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2023 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 value of the dielectric cons\tant?
A. 1.0
Correct B. 2.0
C. 3.0
D. 4.0

Correct Answer: B

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Question 2
A light ray passes through a prism of angle 60° and is re\fracted at an angle of 30°. What is the angle of deviation?
A. 15°
B. 30°
Correct C. 45°
D. 60°

Correct Answer: C

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Question 3
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?
A. 2 N
B. 4 N
Correct C. 6 N
D. 8 N

Correct Answer: C

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Question 4
A beam of light is incident on a mirror at an angle of 30°. What is the angle of reflection?
A. 15°
Correct B. 30°
C. 45°
D. 60°

Correct Answer: B

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Question 5
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?
A. 10 Ω
B. 12 Ω
Correct C. 14 Ω
D. 16 Ω

Correct Answer: C

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Question 6
A sound wave with a frequency of 200 Hz is emitted from 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.
Correct A. 250 Hz
B. 220 Hz
C. 200 Hz
D. 180 Hz

Correct Answer: A

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Question 7
A 2 kg block of metal is heated from 20°C to 80°C. If the specific heat capacity of the metal is 400 J/kg°C, calculate the energy transferred to the block.
Correct A. 16000 J
B. 24000 J
C. 32000 J
D. 40000 J

Correct Answer: A

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Question 8
A radioactive sample decays from 100 g to 50 g in 10 years. If the decay cons\tant is 0.693/10 years, calculate the half-life of the sample.
A. 5 years
Correct B. 10 years
C. 15 years
D. 20 years

Correct Answer: B

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Question 9
A 10 kg block is placed on a frictionless surface and a horizontal force of 20 N is applied. If the block starts from rest, calculate its velocity after 2 seconds.
A. 10 m/s
Correct B. 20 m/s
C. 30 m/s
D. 40 m/s

Correct Answer: B

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Question 10
A 5 kg block is attached to a spring with a force cons\tant of 100 N/m. If the block is displaced by 0.1 m from its equilibrium position, calculate the potential energy stored in the spring.
A. 5 J
Correct B. 10 J
C. 15 J
D. 20 J

Correct Answer: B

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Question 11
A solid sphere of radius 5 cm is floating in a liquid of density 1.5 g/cm³. If the density of the sphere is 6 g/cm³, what is the depth of the sphere below the surface of the liquid?
A. 2.5 cm
Correct B. 5 cm
C. 7.5 cm
D. 10 cm

Correct Answer: B

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Question 12
A convex lens of focal length 15 cm is placed in contact with a concave lens of focal length -20 cm. What is the focal length of the combination?
Correct A. 5 cm
B. 10 cm
C. 15 cm
D. 20 cm

Correct Answer: A

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Question 13
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 force acting on the particle?
A. 10 N
B. 20 N
Correct C. 30 N
D. 40 N

Correct Answer: C

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Question 14
A capacitor of capaci\tance 10 μF is connected in series with a resistor of resis\tance 20 Ω. What is the time cons\tant of the circuit?
A. 0.2 s
Correct B. 0.4 s
C. 0.6 s
D. 0.8 s

Correct Answer: B

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Question 15
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 30° above the horizontal. What is the maximum height reached by the projectile?
A. 10 m
Correct B. 15 m
C. 20 m
D. 25 m

Correct Answer: B

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Question 16
A beam of light 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. 25°
C. 30°
D. 35°

Correct Answer: B

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Question 17
A gas is heated from 300 K to 400 K at cons\tant volume. What is the change in internal energy?
A. 100 J
B. 200 J
Correct C. 300 J
D. 400 J

Correct Answer: C

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Question 18
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 centripetal force acting on the particle?
A. 10 N
B. 20 N
Correct C. 30 N
D. 40 N

Correct Answer: C

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Question 19
A radioactive sample decays from 100 Bq to 50 Bq in 10 minutes. What is the half-life of the sample?
A. 5 min
Correct B. 10 min
C. 15 min
D. 20 min

Correct Answer: B

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Question 20
A lens of focal length 20 cm forms an image of an object at a dis\tance of 30 cm. What is the magnification of the lens?
A. 0.5
Correct B. 1
C. 2
D. 3

Correct Answer: B

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Question 21
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 centripetal force acting on the particle.
A. 12 N
B. 16 N
Correct C. 20 N
D. 24 N

Correct Answer: C

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Question 22
A light ray passes from air into a glass slab of re\fractive index 1.5. If the angle of incidence is 30°, calculate the angle of re\fraction.
A. 18°
B. 20°
Correct C. 22°
D. 25°

Correct Answer: C

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Question 23
A spring with a spring cons\tant of 100 N/m is stretched by 2 m. Calculate the work done in stretching the spring.
A. 200 J
Correct B. 400 J
C. 600 J
D. 800 J

Correct Answer: B

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Question 24
A car travels from rest to a speed of 25 m/s in 10 s. Calculate the acceleration of the car.
A. 2.5 m/s²
Correct B. 5 m/s²
C. 10 m/s²
D. 15 m/s²

Correct Answer: B

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Question 25
A light source is placed 2 m away from a convex lens of focal length 0.5 m. If the image is formed 3 m away from the lens, calculate the magnification of the lens.
A. 2
B. 3
Correct C. 4
D. 5

Correct Answer: C

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