Exam Body

Year

Subject

Paper Type

POST UTME ACHIEVERS UNIVERSITY 2024 Physics | Objective

Are you preparing for POST UTME ACHIEVERS UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2024 Physics (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1

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.

Correct A. 0.01 F

B. 0.02 F

C. 0.03 F

D. 0.04 F

Correct Answer: A

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

Question 2

A wave has a frequency of 100 Hz and a wavelength of 0.5 m. Calculate the speed of the wave.

A. 50 m/s

Correct B. 100 m/s

C. 150 m/s

D. 200 m/s

Correct Answer: B

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

Question 3

A gas has a pressure of 2 atm and a volume of 0.5 m^3. If the temperature is increased by 20 K, calculate the new pressure.

A. 2.5 atm

B. 3 atm

Correct C. 3.5 atm

D. 4 atm

Correct Answer: C

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

Question 4

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

A. 20°

Correct B. 30°

C. 40°

D. 50°

Correct Answer: B

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

Question 5

A capacitor has a capaci\tance of 0.02 F and is connected to a 12 V battery. Calculate the charge stored.

Correct A. 0.24 C

B. 0.26 C

C. 0.28 C

D. 0.30 C

Correct Answer: A

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

Question 6

A radioactive sample undergoes \alpha decay, emitting an \alpha particle with a mass of 4 u and a charge of +2e. If the sample's initial mass is 200 g, what is the mass of the daughter nucleus after 3 half-lives?

Correct A. 25 g

B. 50 g

C. 100 g

D. 200 g

Correct Answer: A

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

Question 7

A capacitor consists of two parallel plates, each with an area of 0.1 m^2 and separated by a dis\tance of 0.01 m. If the capaci\tance is 10 nF, what is the charge stored on the plates when a voltage of 5 V is applied?

Correct A. 50 μC

B. 100 μC

C. 200 μC

D. 500 μC

Correct Answer: A

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

Question 8

A resistor of 10 Ω is connected in series with a 20 Ω resistor and a 30 Ω resistor. If a voltage of 12 V is applied across the circuit, what is the current flowing through the 10 Ω resistor?

Correct A. 1.2 A

B. 1.5 A

C. 2.0 A

D. 3.0 A

Correct Answer: A

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

Question 9

A sound wave with a frequency of 200 Hz and an amplitude of 0.5 m is traveling through a medium with a speed of 340 m/s. What is the wavelength of the sound wave?

A. 1.5 m

Correct B. 1.7 m

C. 2.0 m

D. 2.5 m

Correct Answer: B

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

Question 10

A person is s\tanding 10 m away from a stationary source of sound that is producing a 400 Hz sound wave. If the speed of sound is 340 m/s, what is the time interval between successive compressions of the sound wave?

A. 1.0 ms

B. 2.0 ms

Correct C. 2.5 ms

D. 5.0 ms

Correct Answer: C

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

Question 11

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^-6 F, what is the charge on the plates when the potential difference between them is 100 V?

Correct A. 0.25 C

B. 0.125 C

C. 0.5 C

D. 1 C

Correct Answer: A

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

Question 12

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, what is the change in internal energy?

A. 10000 J

Correct B. 5000 J

C. 2000 J

D. 1000 J

Correct Answer: B

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

Question 13

A magnetic field of strength 0.5 T is directed along the z-axis. A current of 2 A flows in a circular loop of radius 0.1 m. What is the magnitude of the magnetic moment of the loop?

A. 0.01 A m^2

Correct B. 0.1 A m^2

C. 0.5 A m^2

D. 1 A m^2

Correct Answer: B

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

Question 14

A ray 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

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

Question 15

A capacitor of capaci\tance 10^-6 F is charged to a potential difference of 100 V. What is the energy stored in the capacitor?

Correct A. 0.01 J

B. 0.1 J

C. 1 J

D. 10 J

Correct Answer: A

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

Question 16

A 2.5 V battery is connected in series with a 5 ohm resistor and a 10 ohm resistor. What is the total resis\tance of the circuit?

A. 10 ohms

Correct B. 12.5 ohms

C. 15 ohms

D. 20 ohms

Correct Answer: B

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

Question 17

A radioactive subs\tance has a half-life of 5 years. If 100 grams of the subs\tance is initially present, how many grams will remain after 10 years?

Correct A. 12.5 grams

B. 25 grams

C. 50 grams

D. 100 grams

Correct Answer: A

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

Question 18

A particle is projected at an angle of 60 degrees to the horizontal with an initial velocity of 20 m/s. What is the time of flight?

A. 2 seconds

Correct B. 4 seconds

C. 6 seconds

D. 8 seconds

Correct Answer: B

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

Question 19

A block of mass 5 kg is susp\ended from a spring with a spring cons\tant of 100 N/m. What is the frequency of oscillation?

A. 0.5 Hz

Correct B. 1 Hz

C. 2 Hz

D. 5 Hz

Correct Answer: B

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

Question 20

A liquid of density 1000 kg/m^3 is flowing through a pipe of radius 0.1 m. What is the pressure at the center of the pipe?

Correct A. 1000 Pa

B. 2000 Pa

C. 5000 Pa

D. 10000 Pa

Correct Answer: A

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