POST UTME GREENFIELD UNIVERSITY 2023 Physics | Objective

Are you preparing for POST UTME GREENFIELD UNIVERSITY 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 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. 8 N
B. 12 N
Correct C. 16 N
D. 20 N

Correct Answer: C

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Question 2
A wave has a frequency of 50 Hz and a wavelength of 0.2 m. What is the speed of the wave?
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 3
A body of mass 5 kg is moving with a velocity of 10 m/s. What is its kinetic energy?
A. 250 J
Correct B. 500 J
C. 750 J
D. 1000 J

Correct Answer: B

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Question 4
A circuit consists of a 2 Ω resistor and a 4 Ω resistor connected in parallel. What is the equivalent resis\tance of the circuit?
A. 1.33 Ω
Correct B. 1.67 Ω
C. 2 Ω
D. 2.5 Ω

Correct Answer: B

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Question 5
A gas occupies a volume of 2 m³ at a pressure of 1 atm. What is the pressure of the gas if its volume is reduced to 1 m³?
A. 2 atm
B. 3 atm
C. 4 atm
Correct D. 5 atm

Correct Answer: D

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Question 6
A gas is contained in a cylinder of volume 2.5 L at a temperature of 300 K. If the gas is heated to 400 K, what is the new volume of the gas, assuming the pressure remains cons\tant?
Correct A. 3.75 L
B. 4.5 L
C. 5.25 L
D. 6.0 L

Correct Answer: A

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Question 7
A particle is projected at an angle of 60° to the horizontal with an initial velocity of 20 m/s. If the acceleration due to gravity is 9.8 m/s², what is the time taken for the particle to reach its maximum height?
A. 0.5 s
Correct B. 1.0 s
C. 1.5 s
D. 2.0 s

Correct Answer: B

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Question 8
A magnetic field of 0.5 T is directed perp\endicular to a current-carrying wire of length 2 m. If the current in the wire is 5 A, what is the force experienced by the wire?
A. 0.25 N
Correct B. 0.5 N
C. 1.0 N
D. 1.5 N

Correct Answer: B

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Question 9
A sound wave of frequency 200 Hz is traveling through a medium with a speed of 340 m/s. If the wavelength of the wave is 1.7 m, what is the amplitude of the wave?
A. 0.05 m
Correct B. 0.1 m
C. 0.15 m
D. 0.2 m

Correct Answer: B

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Question 10
A meter stick is placed on a horizontal surface with one \end against a wall. If the meter stick is 1 m long and the wall is 0.8 m away from the other \end of the stick, what is the dis\tance between the wall and the other \end of the stick?
A. 0.2 m
B. 0.3 m
Correct C. 0.4 m
D. 0.5 m

Correct Answer: C

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Question 11
A radioactive sample of Uranium-238 decays into Thorium-234 with a half-life of 4.5 billion years. If the initial mass of Uranium-238 is 100 grams, calculate the mass of Thorium-234 produced after 9 billion years.
A. 50 g
B. 25 g
C. 75 g
Correct D. 37.5 g

Correct Answer: D

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Question 12
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. 1.0 m/s
B. 1.4 m/s
Correct C. 2.0 m/s
D. 2.8 m/s

Correct Answer: C

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Question 13
A parallel plate capacitor consists of two plates, each of area 0.01 m^2, separated by a dis\tance of 0.001 m. If the capaci\tance is 10 nF, calculate the charge stored when the potential difference between the plates is 5 V.
A. 50 nC
B. 100 nC
Correct C. 200 nC
D. 500 nC

Correct Answer: C

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Question 14
A particle of mass 1 kg is moving in a circular path of radius 0.5 m with a speed of 2 m/s. If the particle is subjected to a centripetal force of 10 N, calculate the angular velocity of the particle.
A. 10 rad/s
B. 20 rad/s
Correct C. 30 rad/s
D. 40 rad/s

Correct Answer: C

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Question 15
A photon of wavelength 500 nm is incident on a metal surface. If the work function of the metal is 2 eV, calculate the maximum kinetic energy of the emitted electron.
A. 1.78 eV
B. 2.78 eV
Correct C. 3.78 eV
D. 4.78 eV

Correct Answer: C

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Question 16
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 magnitude of the acceleration of the particle?
A. 8 m/s^2
Correct B. 12 m/s^2
C. 16 m/s^2
D. 20 m/s^2

Correct Answer: B

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Question 17
A gas is compressed from an initial volume of 2 m^3 to a final volume of 1 m^3. If the initial pressure is 100 kPa and the final pressure is 200 kPa, what is the work done on the gas?
A. 100 J
B. 200 J
Correct C. 300 J
D. 400 J

Correct Answer: C

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Question 18
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 30° above the horizontal. If the acceleration due to gravity is 9.8 m/s^2, what is the maximum height reached by the projectile?
A. 10 m
B. 15 m
Correct C. 20 m
D. 25 m

Correct Answer: C

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Question 19
A magnetic field is produced by a current-carrying wire. If the current is 2 A and the length of the wire is 1 m, what is the magnitude of the magnetic field at a dis\tance of 0.5 m from the wire?
A. 0.1 T
B. 0.2 T
Correct C. 0.3 T
D. 0.4 T

Correct Answer: C

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Question 20
A force of 10 N is applied to an object of mass 5 kg. If the object is initially at rest, what is its acceleration?
A. 2 m/s^2
B. 4 m/s^2
Correct C. 6 m/s^2
D. 8 m/s^2

Correct Answer: C

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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/s^2, what is the magnitude of the force acting on the particle?
A. 8 N
B. 10 N
Correct C. 12 N
D. 16 N

Correct Answer: C

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Question 22
A parallel plate capacitor has a capaci\tance of 10 μF and is charged to a potential difference of 20 V. If the plates are separated by a dis\tance of 2 mm, what is the surface charge density?
A. 10 μC/m^2
Correct B. 20 μC/m^2
C. 30 μC/m^2
D. 40 μC/m^2

Correct Answer: B

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Question 23
A simple harmonic motion has a maximum displacement of 5 cm and a time period of 2 s. If the particle is at a displacement of 2 cm at t = 1 s, what is the velocity of the particle at that ins\tant?
A. 1 m/s
Correct B. 2 m/s
C. 3 m/s
D. 4 m/s

Correct Answer: B

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Question 24
A gas is heated from 300 K to 400 K at cons\tant volume. If the initial volume is 2 L, what is the final volume?
A. 2.5 L
Correct B. 3 L
C. 3.5 L
D. 4 L

Correct Answer: B

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Question 25
A magnetic field of 0.5 T is applied to a current-carrying wire of length 1 m. If the current is 2 A, what is the force experienced by the wire?
A. 0.5 N
Correct B. 1 N
C. 1.5 N
D. 2 N

Correct Answer: B

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