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POST UTME BOWEN UNIVERSITY 2023 Physics | Objective

Are you preparing for POST UTME BOWEN 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 5 Ω resistor is connected in series with a 10 V battery. If the current through the resistor is 0.2 A, what is the power dissipated by the resistor?

A. 0.1 W

Correct B. 0.2 W

C. 0.5 W

D. 1 W

Correct Answer: B

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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. What is the magnitude of the net force acting on the particle?

A. 10 N

Correct B. 16/3 N

C. 20 N

D. 25 N

Correct Answer: B

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Question 3

A 100 V AC supply is connected across a 50 Ω resistor. If the current through the resistor is 2 A, what is the power dissipated by the resistor?

A. 100 W

B. 150 W

Correct C. 200 W

D. 250 W

Correct Answer: C

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Question 4

A 2 kg block is moving in a straight line with a speed of 5 m/s. If a force of 10 N is applied to the block, what is its acceleration?

A. 2 m/s^2

B. 3 m/s^2

C. 4 m/s^2

Correct D. 5 m/s^2

Correct Answer: D

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Question 5

A 5 Ω resistor is connected in parallel with a 10 Ω resistor. If a voltage of 20 V is applied across the combination, what is the current through the 5 Ω resistor?

A. 2 A

B. 3 A

Correct C. 4 A

D. 5 A

Correct Answer: C

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Question 6

A block of mass 5 kg is attached to a horizontal, massless spring with a spring cons\tant of 200 N/m. The block is displaced by 0.2 m from its equilibrium position and released from rest. Assuming the block undergoes simple harmonic motion, determine the maximum speed of the block as it passes through the equilibrium position.

A. 2 m/s

Correct B. 4 m/s

C. 6 m/s

D. 8 m/s

Correct Answer: B

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Question 7

A convex lens of focal length 20 cm is placed in contact with a concave lens of focal length -15 cm. Determine the focal length of the combination.

Correct A. 10 cm

B. 15 cm

C. 20 cm

D. 25 cm

Correct Answer: A

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Question 8

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. Determine the magnitude of 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 9

A beam of light passes from air into a glass of re\fractive index 1.5. If the angle of incidence is 30°, determine the angle of re\fraction.

A. 20°

Correct B. 25°

C. 30°

D. 35°

Correct Answer: B

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Question 10

A particle of mass 1 kg is in a one-dimensional potential well given by V(x) = 0 for 0 ≤ x ≤ 2 m and V(x) = ∞ for x < 0 and x > 2 m. Determine the ground-state energy of the particle.

A. 0.1 J

Correct B. 0.2 J

C. 0.3 J

D. 0.4 J

Correct Answer: B

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Question 11

A particle of mass 0.5 kg is attached to a spring with a spring cons\tant of 100 N/m. It is displaced by 0.2 m from its equilibrium position and released from rest. Assuming the motion is simple harmonic, calculate the total energy of the particle at time t = 0.

A. 10 J

Correct B. 20 J

C. 30 J

D. 40 J

Correct Answer: B

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Question 12

A circuit consists of a 12 V battery, a 4 Ω resistor, and an inductor with an induc\tance of 0.5 H. If the current in the circuit is 2 A, what is the voltage drop across the inductor?

A. 6 V

B. 8 V

Correct C. 10 V

D. 12 V

Correct Answer: C

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Question 13

A wave has a frequency of 50 Hz and a wavelength of 0.5 m. What is the speed of the wave?

A. 25 m/s

Correct B. 50 m/s

C. 75 m/s

D. 100 m/s

Correct Answer: B

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Question 14

A body is moving in a circular path with a radius of 2 m. If the body completes one revolution in 4 s, what is its angular velocity?

A. 1.57 rad/s

Correct B. 3.14 rad/s

C. 4.71 rad/s

D. 6.28 rad/s

Correct Answer: B

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Question 15

A heat engine operates between the temperatures of 500 K and 300 K. If the engine absorbs 1000 J of heat energy, what is its efficiency?

A. 0.25

Correct B. 0.33

C. 0.4

D. 0.5

Correct Answer: B

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Question 16

A 2 kg block of ice at 0°C is placed in a 5°C water bath. Assuming the specific heat capacity of ice is 2090 J/(kg°C) and the specific heat capacity of water is 4186 J/(kg°C), 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 17

A magnetic field of 0.5 T is applied to a coil of wire with 100 turns and a radius of 0.1 m. If the coil is connected to a 12 V battery, calculate the induced emf in the coil.

A. 0.6 V

B. 1.2 V

Correct C. 2.4 V

D. 3.6 V

Correct Answer: C

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Question 18

A 50 Hz AC voltage source is connected to a 100 Ω resistor. Calculate the current flowing through the resistor.

A. 0.5 A

Correct B. 1 A

C. 2 A

D. 5 A

Correct Answer: B

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Question 19

A simple harmonic motion has a maximum displacement of 2 m and a frequency of 4 Hz. Calculate the angular frequency.

A. 8\pi rad/s

Correct B. 16\pi rad/s

C. 32\pi rad/s

D. 64\pi rad/s

Correct Answer: B

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Question 20

A wave has a frequency of 200 Hz and a wavelength of 0.5 m. Calculate the speed of the wave.

A. 100 m/s

Correct B. 200 m/s

C. 300 m/s

D. 400 m/s

Correct Answer: B

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Question 21

A 2.5 mH inductor is connected in series with a 10 Ω resistor and a 20 V battery. If the initial current is 0 A, calculate the time taken for the current to reach 5 A.

A. 0.5 s

B. 1 s

Correct C. 2 s

D. 5 s

Correct Answer: C

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Question 22

A particle of mass 0.5 kg 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 particle.

A. 10 N

B. 20 N

Correct C. 30 N

D. 40 N

Correct Answer: C

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Question 23

A convex lens of focal length 20 cm is used to form an image of an object placed 30 cm in front of it. Calculate the magnification of the image.

A. 0.5

Correct B. 1

C. 2

D. 3

Correct Answer: B

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Question 24

A 5 μF capacitor is connected in series with a 10 kΩ resistor and a 20 V battery. If the initial charge on the capacitor is 0 C, calculate the time taken for the charge to reach 10 μC.

A. 0.1 s

B. 0.5 s

Correct C. 1 s

D. 2 s

Correct Answer: C

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Question 25

A particle of mass 0.2 kg is moving in a circular path of radius 1.5 m with a cons\tant speed of 6 m/s. Calculate the magnitude of the force acting on the particle.

A. 20 N

B. 30 N

Correct C. 40 N

D. 50 N

Correct Answer: C

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