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POST UTME CRAWFORD UNIVERSITY 2023 Physics | Objective

Are you preparing for POST UTME CRAWFORD 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.

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Question 1

A block of mass 5 kg is susp\ended from a spring with a spring cons\tant of 200 N/m. If the block is displaced by 0.2 m from its equilibrium position, what is the magnitude of the force exerted by the spring on the block?

A. 100 N

Correct B. 200 N

C. 300 N

D. 400 N

Correct Answer: B

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Question 2

A 12 V battery is connected in series with a 4 Ω resistor and a 6 Ω resistor. What is the current flowing through the 4 Ω resistor?

A. 0.5 A

Correct B. 1 A

C. 1.5 A

D. 2 A

Correct Answer: B

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Question 3

A container is filled with water to a height of 10 cm. What is the pressure at the bottom of the container?

A. 1000 Pa

Correct B. 2000 Pa

C. 3000 Pa

D. 4000 Pa

Correct Answer: B

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Question 4

A circuit consists of a 9 V battery, a 10 Ω resistor, and a 20 Ω resistor connected in parallel. What is the total resis\tance of the circuit?

A. 10 Ω

B. 20 Ω

Correct C. 30 Ω

D. 40 Ω

Correct Answer: C

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Question 5

A 100 W light bulb is connected to a 220 V power source. What is the current flowing through the light bulb?

A. 0.5 A

Correct B. 1 A

C. 1.5 A

D. 2 A

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 force of 12 N, what is the magnitude of the force?

A. 8 N

Correct B. 12 N

C. 16 N

D. 20 N

Correct Answer: B

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Question 7

A light ray 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 8

A block of mass 5 kg is attached to a horizontal spring with a spring cons\tant of 200 N/m. If the block is displaced by 0.2 m from its equilibrium position and released, what is the maximum speed of the block?

A. 1.0 m/s

B. 1.5 m/s

Correct C. 2.0 m/s

D. 2.5 m/s

Correct Answer: C

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Question 9

A car is traveling at a speed of 25 m/s. If the driver applies the brakes and the car comes to a stop in 4 s, what is the magnitude of the acceleration?

A. 5 m/s^2

B. 10 m/s^2

C. 15 m/s^2

Correct D. 20 m/s^2

Correct Answer: D

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Question 10

A light source is placed 2 m away from a convex lens of focal length 0.5 m. If the image is formed 1.5 m away from the lens, what is the magnification of the lens?

A. 2

Correct B. 3

C. 4

D. 5

Correct Answer: B

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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 force of 12 N, what is the magnitude of the acceleration of the particle?

A. 4 m/s^2

B. 6 m/s^2

Correct C. 8 m/s^2

D. 10 m/s^2

Correct Answer: C

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Question 12

A capacitor of capaci\tance 10 μF is connected to a battery of voltage 12 V. If the capacitor is initially uncharged, what is the charge on the capacitor after 2 seconds?

A. 100 μC

Correct B. 120 μC

C. 150 μC

D. 200 μC

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 100 Bq, what is the activity of the sample after 10 years?

A. 12.5 Bq

Correct B. 25 Bq

C. 37.5 Bq

D. 50 Bq

Correct Answer: B

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Question 14

A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 30° above the horizontal. If air resis\tance is neglected, what is the maximum height reached by the projectile?

A. 4 m

B. 5 m

Correct C. 5.1 m

D. 6 m

Correct Answer: C

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Question 15

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

A. 4 units

B. 5 units

Correct C. 6 units

D. 7 units

Correct Answer: C

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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 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 17

A wave has a frequency of 50 Hz and a wavelength of 0.2 m. If the wave is traveling in the positive x-direction, what is the direction of the wave's velocity?

Correct A. Positive x-direction

B. Negative x-direction

C. Positive y-direction

D. Negative y-direction

Correct Answer: A

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Question 18

A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in series. If the circuit is closed, what is the current flowing 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 19

A block of mass 5 kg is placed on a frictionless surface and subjected to a horizontal force of 10 N. If the block is initially at rest, what is its acceleration?

A. 2 m/s^2

Correct B. 4 m/s^2

C. 6 m/s^2

D. 8 m/s^2

Correct Answer: B

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Question 20

A wave has a frequency of 60 Hz and a wavelength of 0.3 m. If the wave is traveling in the positive x-direction, what is the speed of the wave?

A. 18 m/s

B. 20 m/s

Correct C. 22 m/s

D. 24 m/s

Correct Answer: C

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Question 21

A circuit consists of a 9 V battery, a 2 Ω resistor, and a 3 Ω resistor connected in parallel. If the circuit is closed, what is the total resis\tance?

A. 1.5 Ω

B. 2.5 Ω

Correct C. 3.5 Ω

D. 4.5 Ω

Correct Answer: C

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Question 22

A block of mass 3 kg is placed on a frictionless surface and subjected to a horizontal force of 8 N. If the block is initially at rest, what is its acceleration?

A. 2.67 m/s^2

Correct B. 3.33 m/s^2

C. 4 m/s^2

D. 5 m/s^2

Correct Answer: B

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Question 23

A 50 Hz, 200 V AC source is connected to a 100 Ω resistor. Calculate the rms value of the current flowing through the resistor.

A. 1 A

Correct B. 2 A

C. 4 A

D. 5 A

Correct Answer: B

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Question 24

A radioactive sample has a half-life of 5 years. If the initial activity is 100 Bq, calculate the activity after 10 years.

A. 12.5 Bq

Correct B. 25 Bq

C. 50 Bq

D. 100 Bq

Correct Answer: B

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Question 25

A parallel plate capacitor has a capaci\tance of 10 μF. If a potential difference of 50 V is applied across the plates, calculate the charge stored on the capacitor.

A. 2.5 × 10^{-4} C

Correct B. 5 × 10^{-4} C

C. 10 × 10^{-4} C

D. 20 × 10^{-4} C

Correct Answer: B

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