POST UTME ELIZADE UNIVERSITY 2021 Physics | Objective

Are you preparing for POST UTME ELIZADE UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2021 Physics (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
A ray of light passes from air into a glass slab at an angle of incidence of 30°. If the re\fractive index of glass is 1.5, calculate the angle of re\fraction.
A. 20°
Correct B. 25°
C. 30°
D. 35°

Correct Answer: B

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Question 2
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 2 m from its equilibrium position and released, 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 3
A gas occupies a volume of 2 m³ at a pressure of 1 atm. If the pressure is increased to 2 atm, calculate the new volume of the gas.
A. 1 m³
B. 2 m³
C. 3 m³
Correct D. 4 m³

Correct Answer: D

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Question 4
A wave has a frequency of 50 Hz and a wavelength of 0.5 m. If the wave is traveling in a medium with a speed of 100 m/s, calculate the amplitude of the wave.
Correct A. 0.01 m
B. 0.1 m
C. 1 m
D. 10 m

Correct Answer: A

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Question 5
A ray of light passes through a prism with an angle of incidence of 30° and an angle of re\fraction of 20°. If the re\fractive index of the prism is 1.5, calculate the angle of emergence.
A. 40°
B. 45°
Correct C. 50°
D. 55°

Correct Answer: C

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Question 6
A 2 kg block is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. The block is displaced by 0.2 m from its equilibrium position and released from rest. Assuming the motion is simple harmonic, 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 7
A parallel plate capacitor consists of two plates, each of area 0.04 m^2, separated by a dis\tance of 0.02 m. The space between the plates is filled with a dielectric material of dielectric cons\tant 2.5. Calculate the capaci\tance of the capacitor.
A. 1.6 x 10^-10 F
B. 3.2 x 10^-10 F
Correct C. 4.8 x 10^-10 F
D. 6.4 x 10^-10 F

Correct Answer: C

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Question 8
A 5 kg block is moving in a circular path of radius 2 m with a cons\tant speed of 4 m/s. Calculate the magnitude of the force acting on the block.
A. 10 N
B. 20 N
Correct C. 30 N
D. 40 N

Correct Answer: C

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Question 9
A gas expands from an initial volume of 0.1 m^3 to a final volume of 0.5 m^3 against an external pressure of 2 x 10^5 Pa. Calculate the work done by the gas.
A. 100 J
B. 200 J
Correct C. 300 J
D. 400 J

Correct Answer: C

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Question 10
A 10 kg block is moving in a straight line with an initial velocity of 5 m/s. After 2 seconds, the block has a velocity of 3 m/s. Assuming a cons\tant acceleration, calculate the acceleration of the block.
A. 1 m/s^2
B. 2 m/s^2
Correct C. 3 m/s^2
D. 4 m/s^2

Correct Answer: C

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Question 11
A uniform magnetic field of magnitude 2.0 T is directed along the z-axis. A current of 5.0 A flows in a circular loop of radius 0.20 m, placed in the x-y plane. What is the magnitude of the magnetic moment of the loop?
A. 0.10 A m^2
Correct B. 0.20 A m^2
C. 0.30 A m^2
D. 0.40 A m^2

Correct Answer: B

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Question 12
A particle of mass 2.0 kg is attached to a spring with spring cons\tant 100 N/m. The particle is displaced by 0.20 m from its equilibrium position and released from rest. What is the angular frequency of the resulting simple harmonic motion?
A. 1.0 rad/s
Correct B. 2.0 rad/s
C. 3.0 rad/s
D. 4.0 rad/s

Correct Answer: B

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Question 13
A photon of energy 2.5 eV is incident on a metal surface. The work function of the metal is 1.8 eV. What is the maximum kinetic energy of the photoelectrons emitted?
A. 0.20 eV
B. 0.30 eV
Correct C. 0.40 eV
D. 0.50 eV

Correct Answer: C

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Question 14
A block of mass 5.0 kg is moving with a velocity of 2.0 m/s on a frictionless surface. A force of 10 N is applied to the block in the direction of motion. What is the acceleration of the block?
A. 0.50 m/s^2
B. 1.0 m/s^2
C. 1.5 m/s^2
Correct D. 2.0 m/s^2

Correct Answer: D

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Question 15
A gas of ideal molecules is confined to a container of volume 2.0 L. The temperature of the gas is 300 K. What is the average kinetic energy of the molecules?
A. 1.5 kJ/mol
Correct B. 2.0 kJ/mol
C. 2.5 kJ/mol
D. 3.0 kJ/mol

Correct Answer: B

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Question 16
A 2.5 mH inductor is connected in series with a 10 Ω resistor and a 20 V AC source. If the frequency of the AC source is 50 Hz, what is the impedance of the circuit?
A. 5 Ω
B. 10 Ω
Correct C. 15 Ω
D. 20 Ω

Correct Answer: C

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Question 17
A radioactive sample has a half-life of 5 years. If the initial activity is 100 Bq, what is the activity after 10 years?
A. 20 Bq
Correct B. 30 Bq
C. 40 Bq
D. 50 Bq

Correct Answer: B

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Question 18
A 5 kg block is moving with a velocity of 2 m/s on a frictionless surface. If a force of 10 N is applied to the block, what is its acceleration?
A. 0.2 m/s^2
B. 0.5 m/s^2
Correct C. 1 m/s^2
D. 2 m/s^2

Correct Answer: C

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Question 19
A 100 μF capacitor is connected in series with a 10 Ω resistor and a 20 V AC source. If the frequency of the AC source is 50 Hz, what is the reac\tance of the capacitor?
A. 10 Ω
B. 20 Ω
Correct C. 50 Ω
D. 100 Ω

Correct Answer: C

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Question 20
A 2.5 mH inductor is connected in series with a 10 Ω resistor and a 20 V AC source. If the frequency of the AC source is 50 Hz, what is the current in the circuit?
A. 0.5 A
Correct B. 1 A
C. 2 A
D. 5 A

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 subject to a centripetal force of 12 N, what is the magnitude of the acceleration of the particle?
Correct A. 6 m/s^2
B. 8 m/s^2
C. 10 m/s^2
D. 12 m/s^2

Correct Answer: A

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Question 22
A block of mass 5 kg is placed on a frictionless surface and attached to a horizontal spring with a force cons\tant of 200 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. 2 m/s
B. 4 m/s
Correct C. 6 m/s
D. 8 m/s

Correct Answer: C

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Question 23
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 60° above the horizontal. If the acceleration due to gravity is 9.8 m/s^2, what is the time of flight of the projectile?
A. 2 s
Correct B. 4 s
C. 6 s
D. 8 s

Correct Answer: B

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Question 24
A car of mass 1500 kg is traveling at a speed of 25 m/s when it encounters a hill with a height of 100 m. If the car is subject to a force of friction of 500 N, what is the minimum speed of the car at the top of the hill?
A. 10 m/s
Correct B. 15 m/s
C. 20 m/s
D. 25 m/s

Correct Answer: B

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Question 25
A block of mass 3 kg is attached to a horizontal spring with a force cons\tant of 300 N/m. If the block is displaced by 0.3 m from its equilibrium position and released from rest, what is the maximum speed of the block?
A. 3 m/s
Correct B. 6 m/s
C. 9 m/s
D. 12 m/s

Correct Answer: B

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