POST UTME BSU 2023 Physics | Objective

Are you preparing for POST UTME BSU 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 2 m long wire of resis\tance 10 Ω is connected in series with a 5 m long wire of resis\tance 20 Ω. If the total resis\tance of the circuit is 30 Ω, what is the length of the third wire connected in parallel with the 5 m long wire?
A. 1 m
B. 2 m
Correct C. 3 m
D. 4 m

Correct Answer: C

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Question 2
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 angular velocity of the particle?
A. 2 rad/s
B. 4 rad/s
Correct C. 6 rad/s
D. 8 rad/s

Correct Answer: C

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Question 3
A 100 μF capacitor is connected in series with a 200 Ω resistor and a 50 mH inductor. If the circuit is driven by a 10 V AC source, what is the impedance of the circuit?
A. 50 Ω
B. 100 Ω
Correct C. 150 Ω
D. 200 Ω

Correct Answer: C

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Question 4
A wave of frequency 100 Hz and wavelength 2 m is traveling through a medium. If the wave is reflected from a fixed \end, what is the frequency of the reflected wave?
A. 50 Hz
Correct B. 100 Hz
C. 150 Hz
D. 200 Hz

Correct Answer: B

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Question 5
A 10 kg block is attached to a horizontal spring with a force cons\tant of 100 N/m. If the block is displaced by 2 m from its equilibrium position and released, what is the maximum velocity 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 6
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. 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 7
A capacitor consists of two parallel plates, each of area 0.1 m^2, separated by a dis\tance of 0.01 m. If the capaci\tance of the capacitor is 10^-6 F, what is the charge stored on the capacitor when a potential difference of 10 V is applied across it?
A. 10^-5 C
Correct B. 10^-6 C
C. 10^-7 C
D. 10^-8 C

Correct Answer: B

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Question 8
A heat engine operates between two temperatures of 500 K and 300 K. If the engine has an efficiency of 30%, what is the maximum possible work output of the engine?
A. 100 J
B. 200 J
Correct C. 300 J
D. 400 J

Correct Answer: C

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Question 9
A particle of mass 1 kg is moving in a straight line with an initial velocity of 5 m/s. If the particle experiences a cons\tant acceleration of 2 m/s^2, what is the velocity of the particle after 3 seconds?
A. 7 m/s
B. 8 m/s
Correct C. 9 m/s
D. 10 m/s

Correct Answer: C

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Question 10
A simple p\endulum consists of a point mass of 0.1 kg attached to a massless string of length 0.5 m. If the p\endulum is released from an initial angle of 30 degrees, what is the maximum speed of the p\endulum?
A. 1.5 m/s
B. 2.0 m/s
Correct C. 2.5 m/s
D. 3.0 m/s

Correct Answer: C

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Question 11
A parallel plate capacitor has plates of area 0.04 m² and separation 0.002 m. If the dielectric cons\tant of the material between the plates is 3, calculate the capaci\tance.
A. 2.5 μF
Correct B. 5 μF
C. 10 μF
D. 20 μF

Correct Answer: B

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Question 12
A particle of mass 0.5 kg is attached to a spring with spring cons\tant 100 N/m. If the particle is displaced by 0.2 m from its equilibrium position and released from rest, calculate the maximum velocity of the particle.
A. 0.5 m/s
B. 1 m/s
Correct C. 2 m/s
D. 5 m/s

Correct Answer: C

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Question 13
A sound wave has a frequency of 200 Hz and a wavelength of 0.5 m. Calculate the speed of the sound wave.
A. 100 m/s
B. 200 m/s
Correct C. 400 m/s
D. 800 m/s

Correct Answer: C

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Question 14
A photon of energy 2.5 eV is incident on a metal surface with work function 1.5 eV. Calculate the maximum kinetic energy of the emitted electron.
A. 0.5 eV
Correct B. 1 eV
C. 1.5 eV
D. 2 eV

Correct Answer: B

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Question 15
A capacitor is connected to a battery of emf 12 V. If the capaci\tance is 10 μF, calculate the charge stored in the capacitor.
A. 0.1 C
Correct B. 0.2 C
C. 0.3 C
D. 0.4 C

Correct Answer: B

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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. 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 17
A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in series. What is the current flowing through the circuit?
A. 1 A
Correct B. 2 A
C. 3 A
D. 4 A

Correct Answer: B

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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. 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 19
A quantum particle has a wave function given by ψ(x) = Ae^\( -αx^2 \). What is the probability of finding the particle between x = 0 and x = 1?
A. 0.5
B. 0.6
Correct C. 0.7
D. 0.8

Correct Answer: C

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Question 20
A simple harmonic motion has a period of 2 s and an amplitude of 3 m. What is the angular frequency?
A. 1 rad/s
Correct B. 2 rad/s
C. 3 rad/s
D. 4 rad/s

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 force of 12 N, what is the magnitude of the acceleration of the particle?
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 22
A parallel plate capacitor has a capaci\tance of 10 μF and is charged to a potential difference of 20 V. If a dielectric material with a dielectric cons\tant of 3 is inserted between the plates, what is the new capaci\tance?
A. 30 μF
B. 40 μF
Correct C. 50 μF
D. 60 μF

Correct Answer: C

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Question 23
A beam of light passes from air into a glass 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 24
A gas is heated from 20°C to 50°C. If the initial pressure is 1 atm, what is the final pressure?
A. 1.5 atm
Correct B. 2 atm
C. 2.5 atm
D. 3 atm

Correct Answer: B

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Question 25
A wave has a frequency of 100 Hz and a wavelength of 0.5 m. What is the speed of the wave?
A. 50 m/s
B. 60 m/s
Correct C. 70 m/s
D. 80 m/s

Correct Answer: C

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