Exam Body

Year

Subject

Paper Type

POST UTME UNN 2022 Physics | Objective

Are you preparing for POST UTME UNN exams? Reviewing past 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

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. 10 m/s^2

Correct B. 12 m/s^2

C. 15 m/s^2

D. 20 m/s^2

Correct Answer: B

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

Question 2

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 group 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 3

A radioactive sample has an initial activity of 100 Bq. If the half-life of the sample is 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

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

Question 4

A gas is contained in a cylinder of volume 2 L. If the temperature of the gas is increased from 300 K to 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

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

Question 5

A particle of mass 1 kg is moving in a straight line with a velocity of 5 m/s. If the particle is subjected to a force of 10 N, what is the acceleration of the particle?

A. 2 m/s^2

B. 5 m/s^2

Correct C. 10 m/s^2

D. 20 m/s^2

Correct Answer: C

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

Question 6

A particle of mass 2 kg is attached to a spring with spring cons\tant 100 N/m. It is displaced by 0.5 m from its equilibrium position and released from rest. Assuming the motion is simple harmonic, calculate the time taken for the particle to return to its equilibrium position.

A. 1.57 s

Correct B. 2.12 s

C. 3.14 s

D. 4.19 s

Correct Answer: B

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

Question 7

A gas at temperature 300 K expands from 1 L to 2 L against a cons\tant external pressure of 2 atm. Assuming the gas is ideal, calculate the work done by the gas.

Correct A. -1.38 kJ

B. -1.73 kJ

C. -2.09 kJ

D. -2.45 kJ

Correct Answer: A

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

Question 8

A block of mass 5 kg is placed on a horizontal, frictionless surface. A horizontal force of 10 N is applied to the block. Calculate 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 9

A parallel plate capacitor has plates of area 0.1 m^2 and separation 0.01 m. The capaci\tance is 10 nF. Calculate the electric field between the plates.

A. 1 kV/m

B. 2 kV/m

Correct C. 3 kV/m

D. 4 kV/m

Correct Answer: C

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

Question 10

A radioactive sample has a half-life of 10 years. If the initial activity is 100 Bq, calculate the activity after 20 years.

A. 12.5 Bq

Correct B. 25 Bq

C. 50 Bq

D. 100 Bq

Correct Answer: B

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

Question 11

A particle of mass $m$ is moving in a circular path of radius $r$ with a cons\tant speed $v$. If the particle is subjected to a centripetal force $F_c = \frac{mv^2}{r}$, what is the magnitude of the acceleration of the particle?

Correct A. \frac{v^2}{r}

B. \frac{mv^2}{r}

C. \frac{v}{r}

D. \frac{m}{r}

Correct Answer: A

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

Question 12

A parallel plate capacitor has a capaci\tance of $C = 2 \mu F$. If a potential difference of $V = 10 V$ is applied across the plates, what is the charge stored on the capacitor?

A. 20 \mu C

Correct B. 40 \mu C

C. 60 \mu C

D. 80 \mu C

Correct Answer: B

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

Question 13

A wave with a frequency of $f = 50 Hz$ is traveling through a medium with a speed of $v = 300 m/s$. What is the wavelength of the wave?

A. 6 m

Correct B. 12 m

C. 18 m

D. 24 m

Correct Answer: B

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

Question 14

A circuit consists of a resistor $R = 10 \Omega$ and an inductor $L = 5 H$ in series. If a voltage source of $V = 20 V$ is applied across the circuit, what is the current flowing through the circuit?

A. 2 A

B. 4 A

Correct C. 6 A

D. 8 A

Correct Answer: C

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

Question 15

A projectile is launched from the ground with an initial velocity of $v_0 = 20 m/s$ at an angle of $\theta = 30^\circ$ above the horizontal. What is the maximum height reached by the projectile?

A. 5 m

Correct B. 10 m

C. 15 m

D. 20 m

Correct Answer: B

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

Question 16

A block of mass 5 kg is susp\ended from a spring with spring cons\tant 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. 2 m/s

B. 4 m/s

Correct C. 6 m/s

D. 8 m/s

Correct Answer: C

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

Question 17

A parallel plate capacitor has plates of area 0.1 m^2 and separation 0.01 m. If a potential difference of 10 V is applied across the plates, what is the capaci\tance of the capacitor?

Correct A. 0.01 F

B. 0.1 F

C. 1 F

D. 10 F

Correct Answer: A

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

Question 18

A particle of mass 2 kg is moving in a circular path of radius 1 m with a speed of 4 m/s. What is the magnitude of the centripetal acceleration of the particle?

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 19

A beam of light passes through a prism and is re\fracted. If the angle of incidence is 30° and the angle of re\fraction is 20°, what is the angle of deviation?

A. 10°

Correct B. 20°

C. 30°

D. 40°

Correct Answer: B

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

Question 20

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

A. 1 A

Correct B. 2 A

C. 3 A

D. 4 A

Correct Answer: B

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

Question 21

A gas is heated from 300 K to 400 K at cons\tant volume. If the initial volume is 2.00 L, what is the final volume?

A. 2.00 L

Correct B. 4.00 L

C. 6.00 L

D. 8.00 L

Correct Answer: B

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

Question 22

A particle of mass 2.00 kg is moving in a circular path of radius 3.00 m with a cons\tant speed of 4.00 m/s. What is the magnitude of the force acting on the particle?

A. 10.0 N

B. 20.0 N

Correct C. 30.0 N

D. 40.0 N

Correct Answer: C

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

Question 23

A light ray passes from air into a glass of re\fractive index 1.50. 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 24

A particle of mass 1.00 kg is moving in a straight line with a velocity of 5.00 m/s. If the particle is subjected to a force of 10.0 N, what is the acceleration of the particle?

A. 1.00 m/s^2

B. 2.00 m/s^2

C. 3.00 m/s^2

Correct D. 4.00 m/s^2

Correct Answer: D

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

Question 25

A light source is placed 2.00 m away from a convex lens of focal length 0.50 m. If the image dis\tance is 1.00 m, what is the magnification of the lens?

A. 2.00

Correct B. 3.00

C. 4.00

D. 5.00

Correct Answer: B

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