POST UTME UNIOSUN 2022 Physics | Objective

Prepare for your exams with POST UTME UNIOSUN questions? Reviewing past/model 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 View Details
A 2.5 V battery is connected in series with a 10 Ω resistor and a 5 μF capacitor. If the capacitor is initially uncharged, what is the time cons\tant of the circuit?
A. 1 ms
Correct B. 10 ms
C. 100 ms
D. 1 s

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 2 View Details
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

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 3 View Details
A nucleus of mass number 238 has an atomic number of 92. What is the number of protons in the nucleus?
A. 90
Correct B. 92
C. 94
D. 96

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 4 View Details
A beam of light passes through a prism and is re\fracted at an angle of 30°. If the angle of incidence is 20°, what is the angle of re\fraction?
A. 10°
B. 20°
Correct C. 30°
D. 40°

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 5 View Details
A 100 μF capacitor 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

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 6 View Details
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 angular velocity of the particle?
A. 2 rad/s
Correct B. 4 rad/s
C. 6 rad/s
D. 8 rad/s

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 7 View Details
A heat engine operates between the temperatures of 500 K and 300 K. If the engine produces 1000 J of work per cycle, what is the efficiency of the engine?
A. 0.25
B. 0.33
Correct C. 0.5
D. 0.67

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 8 View Details
A wave has a frequency of 20 Hz and a wavelength of 0.5 m. If the wave is traveling in the positive x-direction, what is the direction of the particle velocity?
Correct A. positive x-direction
B. negative x-direction
C. positive y-direction
D. negative y-direction

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 9 View Details
A block of mass 5 kg is moving in a straight line with a velocity of 10 m/s. If the block is subjected to a force of 20 N, what is the acceleration of the block?
A. 2 m/s^2
Correct B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 10 View Details
A simple harmonic motion has a maximum displacement of 2 m and a period of 4 s. If the motion starts from the equilibrium position, what is the equation of motion?
Correct A. x(t) = 2 \sin\( \frac{\pi}{2} t \)
B. x(t) = 2 \sin\( \frac{\pi}{4} t \)
C. x(t) = 2 \sin\( \frac{\pi}{8} t \)
D. x(t) = 2 \sin\( \frac{\pi}{16} t \)

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 11 View Details
A parallel plate capacitor has plates of area 0.04 m^2 and separation 0.02 m. If the dielectric cons\tant of the material between the plates is 3, calculate the capaci\tance.
A. 1.6 x 10^-10 F
Correct B. 2.4 x 10^-10 F
C. 3.2 x 10^-10 F
D. 4.0 x 10^-10 F

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 12 View Details
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, calculate the maximum speed of the particle.
A. 1.0 m/s
B. 1.4 m/s
Correct C. 1.8 m/s
D. 2.2 m/s

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 13 View Details
A heat engine operates between the temperatures 300 K and 600 K. If the engine absorbs 1000 J of heat from the high-temperature reservoir, calculate the efficiency of the engine.
A. 0.33
B. 0.40
Correct C. 0.50
D. 0.60

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 14 View Details
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, calculate the current in the circuit.
A. 1.5 A
Correct B. 2.0 A
C. 2.5 A
D. 3.0 A

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 15 View Details
A particle of mass 0.2 kg is moving in a circular path of radius 0.5 m with a speed of 2 m/s. If the particle is subject to a centripetal force of 10 N, calculate the acceleration of the particle.
A. 5.0 m/s^2
B. 6.0 m/s^2
Correct C. 7.0 m/s^2
D. 8.0 m/s^2

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 16 View Details
A 2.5 V battery is connected in series with a 10 Ω resistor and a 5 Ω resistor. If the current through the 10 Ω resistor is 0.2 A, what is the current through the 5 Ω resistor?
A. 0.1 A
B. 0.2 A
Correct C. 0.3 A
D. 0.4 A

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 17 View Details
A radioactive sample has a half-life of 10 years. If the initial activity is 100 Bq, what is the activity after 20 years?
A. 25 Bq
Correct B. 50 Bq
C. 75 Bq
D. 100 Bq

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 18 View Details
A 5 kg block is attached to a horizontal spring with a force cons\tant of 100 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. 0.5 m/s
B. 1.0 m/s
Correct C. 1.5 m/s
D. 2.0 m/s

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 19 View Details
A gas occupies a volume of 2.5 L at a pressure of 1.5 atm. If the temperature is increased by 20°C, what is the new volume?
A. 3.0 L
B. 3.5 L
Correct C. 4.0 L
D. 4.5 L

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 20 View Details
A 10 kg object is moving in a circular path with a radius of 2 m. If the object has a speed of 5 m/s, what is the centripetal acceleration?
A. 2.5 m/s^2
Correct B. 5.0 m/s^2
C. 7.5 m/s^2
D. 10.0 m/s^2

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 21 View Details
A sound wave with a frequency of 200 Hz is emitted from a source moving towards a stationary observer. If the speed of sound in air is 343 m/s, calculate the apparent frequency heard by the observer.
A. 220 Hz
Correct B. 240 Hz
C. 260 Hz
D. 280 Hz

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 22 View Details
A ray of light passes from air into a glass slab of re\fractive index 1.5. If the angle of incidence is 30°, calculate the angle of re\fraction.
Correct A. 18.43°
B. 20.73°
C. 22.03°
D. 23.33°

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 23 View Details
A nucleus of mass number 240 and atomic number 94 undergoes \alpha decay. If the daughter nucleus has a mass number of 228, calculate the energy released in the decay.
A. 1.23 x 10^\( -12 \) J
B. 1.45 x 10^\( -12 \) J
Correct C. 1.67 x 10^\( -12 \) J
D. 1.89 x 10^\( -12 \) J

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 24 View Details
A 100 Ω resistor is connected in series with a 50 Ω resistor and a 200 Ω resistor. If a 12 V battery is connected across the circuit, calculate the current flowing through the 50 Ω resistor.
Correct A. 0.24 A
B. 0.36 A
C. 0.48 A
D. 0.60 A

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 25 View Details
A heat engine operates between two temperatures, 300 K and 500 K. If the efficiency of the engine is 30%, calculate the work done by the engine.
A. 1.23 x 10^\( -3 \) J
B. 1.45 x 10^\( -3 \) J
Correct C. 1.67 x 10^\( -3 \) J
D. 1.89 x 10^\( -3 \) J

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Help others prepare! Share this practice hub:
Chat with Support