POST UTME ELIZADE UNIVERSITY 2018 Physics | Objective

Are you preparing for POST UTME ELIZADE UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2018 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 is subjected to a centripetal acceleration of 2 m/s^2, what is the magnitude of the force acting on the particle?
A. 10 N
Correct B. 12 N
C. 15 N
D. 20 N

Correct Answer: B

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Question 2
A wave has a frequency of 50 Hz and a wavelength of 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 3
A radioactive sample has an initial activity of 100 Bq. If the sample decays with a half-life of 10 minutes, what is the activity of the sample after 20 minutes?
A. 50 Bq
B. 25 Bq
Correct C. 12.5 Bq
D. 6.25 Bq

Correct Answer: C

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Question 4
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 from rest, what is the maximum speed of the block?
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 5
A particle of mass 1 kg is moving in a circular path of radius 1 m with a cons\tant speed of 3 m/s. If the particle is subjected to a centripetal acceleration of 1 m/s^2, what is the magnitude of the force acting on the particle?
A. 3 N
B. 6 N
Correct C. 9 N
D. 12 N

Correct Answer: C

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Question 6
A nucleus of mass number 240 and atomic number 94 undergoes \beta decay. What is the resulting nucleus?
A. Th-240
B. U-240
C. Pa-240
Correct D. Np-240

Correct Answer: D

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Question 7
A particle of mass 1 u and charge +e is moving in a circular path of radius 1 m in a magnetic field of strength 1 T. What is the speed of the particle?
A. 1 m/s
B. 10 m/s
Correct C. 100 m/s
D. 1000 m/s

Correct Answer: C

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Question 8
A capacitor of capaci\tance 1 μF is connected in series with a resistor of resis\tance 1 kΩ. What is the time cons\tant of the circuit?
A. 1 ms
B. 10 ms
Correct C. 100 ms
D. 1 s

Correct Answer: C

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Question 9
A wave of frequency 100 Hz and wavelength 10 m is traveling through a medium. What is the speed of the wave?
A. 10 m/s
B. 100 m/s
Correct C. 1000 m/s
D. 10,000 m/s

Correct Answer: C

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Question 10
A sound wave of frequency 200 Hz and amplitude 1 mm is traveling through air. What is the intensity of the wave?
A. 1 μW/m²
B. 10 μW/m²
Correct C. 100 μW/m²
D. 1 mW/m²

Correct Answer: C

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Question 11
A particle of mass $m$ is moving in a circular path of radius $R$ with a cons\tant speed $v$. The particle experiences a centripetal force $F_c$ given by $F_c = \frac{mv^2}{R}$. If the particle's speed is doubled to $2v$, what is the new centripetal force $F_{c,new}$?
A. 4mv^2/R
B. 2mv^2/R
C. mv^2/R
Correct D. m(2v)^2/R

Correct Answer: D

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Question 12
A sound wave with a frequency of 200 Hz is traveling through a medium with a speed of 340 m/s. If the wavelength of the sound wave is 1.7 m, what is the amplitude of the sound wave?
Correct A. 0.1 m
B. 0.2 m
C. 0.3 m
D. 0.4 m

Correct Answer: A

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Question 13
A car is traveling at a cons\tant speed of 25 m/s on a circular track with a radius of 50 m. If the car takes 10 s to complete one lap, what is the angular velocity of the car?
A. 0.2 rad/s
Correct B. 0.4 rad/s
C. 0.6 rad/s
D. 0.8 rad/s

Correct Answer: B

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Question 14
A gas is contained in a cylinder with a volume of 2 L and a pressure of 1 atm. If the temperature of the gas is increased by 10°C, what is the new pressure of the gas?
A. 1.1 atm
B. 1.2 atm
Correct C. 1.3 atm
D. 1.4 atm

Correct Answer: C

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Question 15
A beam of light is pas\sing through a prism with an angle of re\fraction of 30°. If the angle of incidence is 20°, what is the angle of emergence?
A. 10°
B. 20°
C. 30°
Correct D. 40°

Correct Answer: D

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Question 16
A thermodynamic system undergoes a process from state A to state B. The initial temperature is 300 K and the final temperature is 400 K. If the change in entropy is 50 J/K, calculate the heat absorbed by the system.
A. 100 J
B. 200 J
Correct C. 300 J
D. 400 J

Correct Answer: C

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Question 17
A convex lens of focal length 20 cm is placed in contact with a concave lens of focal length -15 cm. What is the focal length of the combination?
A. -5 cm
Correct B. 10 cm
C. 15 cm
D. 20 cm

Correct Answer: B

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Question 18
A gas is heated from 300 K to 400 K at cons\tant volume. If the initial pressure is 1 atm, calculate the final pressure.
A. 1.33 atm
B. 1.5 atm
Correct C. 1.67 atm
D. 2 atm

Correct Answer: C

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Question 19
A point charge of 2 μC is placed at the origin. What is the electric potential at a point 0.5 m away from the charge?
A. 1000 V
Correct B. 2000 V
C. 3000 V
D. 4000 V

Correct Answer: B

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Question 20
A capacitor of capaci\tance 10 μF is charged to a potential difference of 10 V. What is the energy stored in the capacitor?
Correct A. 0.1 J
B. 1 J
C. 10 J
D. 100 J

Correct Answer: A

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Question 21
A parallel plate capacitor has plates of area 0.04 m^2 and separation 3 mm. If the capaci\tance is 2.5 nF, what is the charge on the plates when a potential difference of 10 V is applied?
Correct A. 0.025 C
B. 0.05 C
C. 0.1 C
D. 0.2 C

Correct Answer: A

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Question 22
A particle of mass 0.5 kg is attached to a spring with spring cons\tant 100 N/m. If the particle is displaced by 0.2 m from its equilibrium position and released from rest, what is its angular frequency?
A. 1.58 rad/s
Correct B. 2.51 rad/s
C. 3.14 rad/s
D. 5.12 rad/s

Correct Answer: B

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Question 23
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 60° above the horizontal. If air resis\tance is neglected, what is the maximum height reached by the projectile?
A. 10.2 m
Correct B. 15.3 m
C. 20.4 m
D. 25.5 m

Correct Answer: B

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Question 24
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° in the counterclockwise direction, what is its new magnitude?
A. 5.12 units
B. 5.66 units
Correct C. 6.08 units
D. 6.50 units

Correct Answer: C

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Question 25
A particle of mass 0.2 kg is moving in a circular path with a radius of 0.5 m. If the particle has a speed of 2 m/s, what is its centripetal acceleration?
A. 0.25 m/s^2
Correct B. 0.50 m/s^2
C. 0.75 m/s^2
D. 1.00 m/s^2

Correct Answer: B

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