POST UTME BABCOCK UNIVERSITY 2019 Physics | Objective

Are you preparing for POST UTME BABCOCK 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 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, what is the magnitude of the centripetal acceleration?
A. 6 m/s^2
B. 8 m/s^2
Correct C. 10 m/s^2
D. 12 m/s^2

Correct Answer: C

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Question 2
A gas at 300 K is compressed from 10 L to 5 L. If the initial pressure is 2 atm, what is the final pressure?
A. 4 atm
Correct B. 6 atm
C. 8 atm
D. 10 atm

Correct Answer: B

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Question 3
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 4
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. 40 Bq
C. 60 Bq
D. 80 Bq

Correct Answer: B

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Question 5
A particle of mass 1 kg is moving in a circular path with a cons\tant speed of 3 m/s. If the radius of the path is 2 m, 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 6
A 2 kg block of ice at 0°C is placed in a 10°C water bath. Assuming the specific heat capacity of ice is 2090 J/(kg·K) and the specific heat capacity of water is 4186 J/(kg·K), calculate the time it takes for the ice to melt completely.
A. 10 minutes
B. 20 minutes
Correct C. 30 minutes
D. 40 minutes

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 12 V. If a dielectric slab of thickness 2 mm and dielectric cons\tant 4 is inserted between the plates, calculate 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 100 Ω resistor is connected in series with a 50 Ω resistor and a 20 Ω resistor. If a 12 V battery is connected across the circuit, calculate the current flowing through the 100 Ω resistor.
A. 0.2 A
Correct B. 0.3 A
C. 0.4 A
D. 0.5 A

Correct Answer: B

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Question 9
A particle is projected from the origin with an initial velocity of 20 m/s at an angle of 60° to the horizontal. Calculate the time of flight.
A. 2 s
B. 3 s
Correct C. 4 s
D. 5 s

Correct Answer: C

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Question 10
A 5 kg block is susp\ended from a 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 velocity.
A. 2 m/s
B. 3 m/s
Correct C. 4 m/s
D. 5 m/s

Correct Answer: C

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Question 11
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 experiences a centripetal force of 12 N, what is the magnitude of the acceleration of the particle?
A. 10 m/s^2
B. 12 m/s^2
Correct C. 15 m/s^2
D. 20 m/s^2

Correct Answer: C

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Question 12
A 100 V, 10 A AC source is connected to a 50 Ω resistor. If the frequency of the AC source is 60 Hz, what is the rms value of the current in the circuit?
A. 5 A
Correct B. 6 A
C. 8 A
D. 10 A

Correct Answer: B

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Question 13
A radioactive sample has a half-life of 5 years. If the initial activity of the sample is 1000 Bq, what is the activity of the sample after 10 years?
A. 250 Bq
B. 500 Bq
Correct C. 750 Bq
D. 1000 Bq

Correct Answer: C

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Question 14
A 2 kg object is moving in a straight line with a velocity of 5 m/s. If the object experiences a force of 10 N for 2 seconds, what is the change in momentum of the object?
A. 10 kg m/s
Correct B. 20 kg m/s
C. 30 kg m/s
D. 40 kg m/s

Correct Answer: B

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Question 15
A 100 V, 10 A AC source is connected to a 50 Ω resistor. If the frequency of the AC source is 60 Hz, what is the rms value of the voltage in the circuit?
A. 50 V
B. 60 V
Correct C. 70 V
D. 80 V

Correct Answer: C

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Question 16
A particle of mass 2 kg is attached to a spring with a spring cons\tant of 100 N/m. If the particle is displaced by 0.2 m from its equilibrium position and released from rest, calculate the angular frequency of the simple harmonic motion.
A. 10 rad/s
Correct B. 20 rad/s
C. 30 rad/s
D. 40 rad/s

Correct Answer: B

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Question 17
A beam of light passes from air into a glass of re\fractive index 1.5. If the angle of incidence is 30°, calculate the angle of re\fraction.
A. 20°
Correct B. 25°
C. 30°
D. 35°

Correct Answer: B

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Question 18
A car travels from point A to point B with a cons\tant acceleration of 2 m/s². If the initial velocity is 5 m/s and the final velocity is 15 m/s, calculate the time taken to travel from point A to point B.
A. 5 s
Correct B. 10 s
C. 15 s
D. 20 s

Correct Answer: B

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Question 19
A gas is heated from 300 K to 400 K at cons\tant volume. If the initial pressure is 100 kPa, calculate the final pressure.
A. 120 kPa
Correct B. 140 kPa
C. 160 kPa
D. 180 kPa

Correct Answer: B

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Question 20
A ray of light passes through a convex lens of focal length 20 cm. If the object dis\tance is 30 cm, calculate the image dis\tance.
A. 10 cm
Correct B. 20 cm
C. 30 cm
D. 40 cm

Correct Answer: B

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Question 21
A block of mass 5 kg is attached to a horizontal, massless spring with a force cons\tant of 200 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 as it passes through the equilibrium position.
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 22
A parallel plate capacitor has a capaci\tance of 10 μF and is charged to a potential difference of 12 V. If a dielectric slab of thickness 0.5 mm and dielectric cons\tant 4 is inserted between the plates, calculate 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 23
A 2 kg block is moving in a circular path of radius 1.5 m with a cons\tant speed of 4 m/s. If the block is subjected to a \tangential force of 10 N, calculate the change in its kinetic energy.
A. 20 J
B. 30 J
Correct C. 40 J
D. 50 J

Correct Answer: C

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Question 24
A coil of wire with 100 turns and a radius of 0.1 m is placed in a magnetic field of strength 0.5 T. If the current in the coil is 2 A, calculate the torque experienced by the coil.
A. 0.1 Nm
B. 0.2 Nm
Correct C. 0.3 Nm
D. 0.4 Nm

Correct Answer: C

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Question 25
A 50 Hz AC voltage source is connected to a 100 Ω resistor. If the maximum voltage is 200 V, calculate the maximum current.
A. 2 A
B. 4 A
Correct C. 6 A
D. 8 A

Correct Answer: C

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