POST UTME BELLS UNIVERSITY 2019 Physics | Objective

Are you preparing for POST UTME BELLS UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2019 Physics (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
A 1000 Hz AC voltage source is connected to a 50 Ω resistor in series with a 200 mH inductor. What is the phase angle between the voltage and current?
A. π/4
B. π/3
Correct C. π/2
D. π/6

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 speed of 4 m/s. What is the magnitude of the centripetal 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 3
A 10 μCi source of 226 Ra decays by \alpha emission. What is the activity of the source after 2 half-lives?
A. 5 μCi
B. 2.5 μCi
C. 1.25 μCi
Correct D. 0.625 μCi

Correct Answer: D

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Question 4
A 100 W light bulb is connected to a 120 V AC source. What is the impedance of the bulb?
A. 50 Ω
Correct B. 100 Ω
C. 150 Ω
D. 200 Ω

Correct Answer: B

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Question 5
A 2 kg object is attached to a spring with a spring cons\tant of 100 N/m. What is the frequency of oscillation?
A. 0.5 Hz
Correct B. 1 Hz
C. 2 Hz
D. 5 Hz

Correct Answer: B

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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 acceleration of 2 m/s^2, what is 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 7
A parallel plate capacitor has a capaci\tance of 10 μF and is charged to a potential difference of 5 V. If a dielectric slab of thickness 2 mm and dielectric cons\tant 3 is inserted between the plates, what is the new capaci\tance?
A. 20 μF
B. 30 μF
Correct C. 40 μF
D. 50 μF

Correct Answer: C

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Question 8
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 9
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 10
A radioactive sample decays from 100 g to 50 g in 10 minutes. What is the half-life of the sample?
A. 5 minutes
Correct B. 10 minutes
C. 15 minutes
D. 20 minutes

Correct Answer: B

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Question 11
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, what is the apparent frequency heard by the observer?
Correct A. 220 Hz
B. 200 Hz
C. 180 Hz
D. 160 Hz

Correct Answer: A

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Question 12
A 12 V battery is connected in series with a 4 Ω resistor and a 6 Ω resistor. What is the total resis\tance in the circuit?
A. 2 Ω
B. 4 Ω
C. 6 Ω
Correct D. 10 Ω

Correct Answer: D

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Question 13
A gas at 300 K has a volume of 2.5 L. If the temperature is increased to 400 K, what is the new volume of the gas?
A. 3.2 L
B. 3.5 L
Correct C. 4.0 L
D. 4.5 L

Correct Answer: C

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Question 14
A particle of mass 2 kg is moving in a circular path with a radius of 3 m. If the particle has 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 15
A light wave with a wavelength of 600 nm is incident on a double-slit apparatus. If the dis\tance between the slits is 0.5 mm, what is the angle of the first minimum?
A. 10°
B. 20°
Correct C. 30°
D. 40°

Correct Answer: C

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Question 16
A gas is enclosed in a container at a temperature of 300 K. If the temperature is increased to 400 K, what is the ratio of the final volume to the initial volume?
Correct A. 1.33
B. 2.00
C. 3.00
D. 4.00

Correct Answer: A

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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 total resis\tance of the circuit?
A. 10 Ω
B. 12 Ω
Correct C. 16 Ω
D. 20 Ω

Correct Answer: C

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Question 18
A radioactive sample decays at a rate of 0.5% per hour. If the initial mass of the sample is 100 g, what is the mass of the sample after 3 hours?
A. 90 g
B. 80 g
Correct C. 70 g
D. 60 g

Correct Answer: C

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Question 19
A 100 V AC source is connected to a 20 Ω resistor. What is the current flowing through the resistor?
A. 5 A
Correct B. 10 A
C. 15 A
D. 20 A

Correct Answer: B

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Question 20
A vector has a magnitude of 5 units and an angle of 30° with the positive x-axis. What is the x-component of the vector?
Correct A. 4 units
B. 5 units
C. 6 units
D. 7 units

Correct Answer: A

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