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POST UTME RSU 2021 Physics | Objective

Are you preparing for POST UTME RSU exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2021 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 of radius 3 m with a cons\tant speed of 4 m/s. If the particle experiences a centripetal acceleration of 2 m/s², what is the magnitude of the net force acting on the particle?

A. 8 N

B. 10 N

C. 12 N

Correct D. 16 N

Correct Answer: D

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Question 2

A circuit consists of a 12 V battery, a 4 µF resistor, and a 6 µF inductor connected in series. If the circuit is closed at time t = 0, what is the current in the circuit at time t = 2 ms?

A. 0.5 A

B. 1 A

Correct C. 1.5 A

D. 2 A

Correct Answer: C

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Question 3

A gas is contained in a cylinder of volume 2 L at a temperature of 300 K. If the gas is heated to a temperature of 400 K, what is the new volume of the gas?

A. 2.5 L

B. 3 L

C. 3.5 L

Correct D. 4 L

Correct Answer: D

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Question 4

A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 30° above the horizontal. If the projectile lands 10 m away from the launch point, what is the initial velocity of the projectile?

A. 15 m/s

Correct B. 20 m/s

C. 25 m/s

D. 30 m/s

Correct Answer: B

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Question 5

A block of mass 2 kg is susp\ended from a spring with a spring cons\tant of 100 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 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 6

A parallel plate capacitor has a capaci\tance of 10 μF. If a potential difference of 20 V is applied across the plates, what is the energy stored in the capacitor?

A. 0.2 J

Correct B. 0.4 J

C. 0.6 J

D. 0.8 J

Correct Answer: B

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Question 7

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 8

A resistor of 10 Ω and an inductor of 20 mH are connected in series. If a voltage of 20 V is applied across the circuit, what is the current in the circuit?

A. 0.5 A

B. 1 A

Correct C. 1.5 A

D. 2 A

Correct Answer: C

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Question 9

A 10 μF capacitor is charged to a potential difference of 20 V. What is the energy stored in the capacitor?

A. 0.2 J

Correct B. 0.4 J

C. 0.6 J

D. 0.8 J

Correct Answer: B

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Question 10

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?

Correct A. 6 m/s^2

B. 8 m/s^2

C. 10 m/s^2

D. 12 m/s^2

Correct Answer: A

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Question 11

A heat engine operates between two temperatures of 500 K and 300 K. If the engine produces 1000 J of work, 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 12

A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 60° above the horizontal. If the projectile lands 50 m away from the launch point, what is the time of flight?

A. 2 s

Correct B. 3 s

C. 4 s

D. 5 s

Correct Answer: B

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Question 13

A simple harmonic motion has a maximum displacement of 2 m and a period of 4 s. If the motion starts from its equilibrium position, what is the amplitude of the motion?

Correct A. 1 m

B. 2 m

C. 3 m

D. 4 m

Correct Answer: A

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Question 14

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. 2.5 L

Correct B. 3 L

C. 3.5 L

D. 4 L

Correct Answer: B

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Question 15

A particle of mass 1 kg is moving in a circular path of radius 2 m with a cons\tant speed of 3 m/s. If the particle is subjected to a centripetal force of 6 N, what is the magnitude of the acceleration of the particle?

Correct A. 6 m/s^2

B. 8 m/s^2

C. 10 m/s^2

D. 12 m/s^2

Correct Answer: A

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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

Correct B. 10 N

C. 12 N

D. 16 N

Correct Answer: B

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Question 17

A wave has a frequency of 50 Hz and a wavelength of 0.5 m. If the wave is traveling at a speed of 20 m/s, what is the amplitude of the wave?

A. 0.1 m

B. 0.2 m

C. 0.3 m

Correct D. 0.4 m

Correct Answer: D

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Question 18

A vector has a magnitude of 5 units and makes an angle of 30° with the positive x-axis. If the vector is rotated by 60° counterclockwise, what is the new magnitude of the vector?

A. 5 units

B. 6 units

Correct C. 7 units

D. 8 units

Correct Answer: C

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Question 19

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

A. 6 V

B. 8 V

Correct C. 10 V

D. 12 V

Correct Answer: C

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Question 20

A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 45° above the horizontal. If the air resis\tance is negligible, what is the maximum height reached by the projectile?

A. 10 m

B. 15 m

Correct C. 20 m

D. 25 m

Correct Answer: C

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Question 21

A parallel plate capacitor has a capaci\tance of 10 μF. If a potential difference of 5 V is applied across the plates, what is the charge stored on each plate?

A. 50 μC

Correct B. 25 μC

C. 100 μC

D. 500 μC

Correct Answer: B

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Question 22

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 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 light ray passes from air into a glass slab of thickness 2 cm and 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 24

A wave has a frequency of 100 Hz and a wavelength of 2 m. What is the speed of the wave?

A. 200 m/s

Correct B. 400 m/s

C. 600 m/s

D. 800 m/s

Correct Answer: B

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Question 25

A particle of mass 1 kg is moving in a circular path of radius 1 m with a cons\tant speed of 2 m/s. What is the magnitude of the force acting on the particle?

A. 2 N

B. 4 N

Correct C. 6 N

D. 8 N

Correct Answer: C

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