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POST UTME BOWEN UNIVERSITY 2022 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 2022 Physics (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1

A light ray passes from air into a medium with re\fractive index 1.5. If the angle of incidence is 30°, what is the angle of re\fraction?

Correct A. 20°

B. 30°

C. 40°

D. 50°

Correct Answer: A

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Question 2

A circuit consists of a 12 V battery, a 4 Ω resistor, and a 2 Ω resistor connected in series. What is the current through the 4 Ω resistor?

A. 1 A

Correct B. 2 A

C. 3 A

D. 4 A

Correct Answer: B

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Question 3

A heat engine operates between two temperatures, 500 K and 300 K. If the efficiency of the engine is 30%, what is the work done per cycle?

A. 100 J

B. 200 J

Correct C. 300 J

D. 400 J

Correct Answer: C

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Question 4

A sound wave has a frequency of 200 Hz and a speed of 340 m/s. What is the wavelength of the sound wave?

A. 1.7 m

Correct B. 1.8 m

C. 1.9 m

D. 2.0 m

Correct Answer: B

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Question 5

A light source is placed 2 m away from a convex lens with a focal length of 0.5 m. What is the image dis\tance?

A. -1 m

Correct B. -2 m

C. -3 m

D. -4 m

Correct Answer: B

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Question 6

A parallel plate capacitor has plates of area 0.04 m^2 and separation 0.02 m. If the capaci\tance is 2.5 x 10^-10 F, what is the charge on the plates when the potential difference between them is 100 V?

A. 2.5 x 10^-9 C

Correct B. 5 x 10^-9 C

C. 1 x 10^-8 C

D. 2 x 10^-8 C

Correct Answer: B

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Question 7

A radioactive sample has a half-life of 10 years. If the initial activity is 100 Bq, what is the activity after 20 years?

Correct A. 25 Bq

B. 50 Bq

C. 75 Bq

D. 100 Bq

Correct Answer: A

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Question 8

A particle moves in a circular path with a radius of 2 m and a speed of 4 m/s. If the particle is displaced by 1 m from its initial position, what is the change in its kinetic energy?

A. 2 J

Correct B. 4 J

C. 6 J

D. 8 J

Correct Answer: B

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Question 9

A heat engine operates between two reservoirs at temperatures 300 K and 400 K. If the engine absorbs 100 J of heat from the high-temperature reservoir, what is the efficiency of the engine?

A. 0.25

Correct B. 0.30

C. 0.35

D. 0.40

Correct Answer: B

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Question 10

A body of mass 2 kg is moving with a velocity of 5 m/s. If the body is subjected to a force of 10 N, what is the acceleration of the body?

A. 2 m/s^2

B. 5 m/s^2

Correct C. 10 m/s^2

D. 15 m/s^2

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 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 12

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. 1 L

Correct B. 2 L

C. 3 L

D. 4 L

Correct Answer: B

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Question 13

A radioactive sample has an initial activity of 100 Bq. If the half-life of the sample is 10 minutes, what is the activity after 20 minutes?

A. 25 Bq

Correct B. 50 Bq

C. 75 Bq

D. 100 Bq

Correct Answer: B

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Question 14

A simple harmonic motion has an amplitude of 2 m and a frequency of 3 Hz. If the initial phase angle is 30°, what is the equation of motion?

Correct A. \text{x}(t) = 2 \cdot \sin\( 6t + 30° \)

B. \text{x}(t) = 2 \cdot \sin\( 6t - 30° \)

C. \text{x}(t) = 2 \cdot \cos\( 6t + 30° \)

D. \text{x}(t) = 2 \cdot \cos\( 6t - 30° \)

Correct Answer: A

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Question 15

A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in series. If the current is 2 A, what is the voltage drop across the 6 Ω resistor?

A. 6 V

Correct B. 8 V

C. 10 V

D. 12 V

Correct Answer: B

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Question 16

A parallel plate capacitor with plates of area 0.04 m^2 and separation 0.02 m is charged to a potential difference of 10 V. If the plates are then connected to a 5 F capacitor in parallel, what is the resulting charge on the 5 F capacitor?

A. 0.02 C

B. 0.04 C

Correct C. 0.06 C

D. 0.08 C

Correct Answer: C

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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°, what is the angle of re\fraction?

Correct A. 20°

B. 30°

C. 40°

D. 50°

Correct Answer: A

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Question 18

A point charge of 2 μC is placed at the center of a circular loop of wire of radius 0.1 m. If the loop is made of a material with a magnetic permeability of 4π × 10^\( -7 \) H/m, what is the magnetic field at the center of the loop?

A. 0.02 T

Correct B. 0.04 T

C. 0.06 T

D. 0.08 T

Correct Answer: B

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Question 19

A heat engine operates between a high-temperature reservoir at 500 K and a low-temperature reservoir at 300 K. If the engine has an efficiency of 30%, what is the maximum possible work output?

A. 1000 J

Correct B. 2000 J

C. 3000 J

D. 4000 J

Correct Answer: B

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Question 20

A vector A has a magnitude of 5 m and makes an angle of 60° with the x-axis. If vector B has a magnitude of 3 m and makes an angle of 30° with the x-axis, what is the magnitude of the resul\tant vector A + B?

A. 4 m

B. 5 m

Correct C. 6 m

D. 7 m

Correct Answer: C

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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 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 22

A projectile is launched from the ground with an initial velocity of 50 m/s at an angle of 60° above the horizontal. Assuming a cons\tant acceleration due to gravity of 9.8 m/s², determine the time of flight of the projectile.

A. 2 s

B. 4 s

Correct C. 6 s

D. 8 s

Correct Answer: C

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Question 23

A gas is compressed from an initial volume of 2 m³ to a final volume of 1 m³ at a cons\tant temperature of 300 K. Assuming the gas obeys Boyle's Law, determine the final pressure of the gas.

A. 100 kPa

B. 200 kPa

Correct C. 300 kPa

D. 400 kPa

Correct Answer: C

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Question 24

A heat engine operates between a high-temperature reservoir at 500 K and a low-temperature reservoir at 300 K. Assuming the engine has an efficiency of 30%, determine 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 25

A simple p\endulum of length 1 m is released from rest at an angle of 30° from the vertical. Assuming the p\endulum undergoes simple harmonic motion, determine the time period of the p\endulum.

A. 2 s

Correct B. 4 s

C. 6 s

D. 8 s

Correct Answer: B

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