Exam Body

Year

Subject

Paper Type

POST UTME NILE UNIVERSITY 2022 Physics | Objective

Are you preparing for POST UTME NILE UNIVERSITY 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 radioactive sample of Δₗ emits Δₗ⁴ particles with a half-life of 5.27 years. If the initial activity is 120 Bq, what is the activity after 10 years?

A. 60 Bq

Correct B. 40 Bq

C. 20 Bq

D. 10 Bq

Correct Answer: B

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

Question 2

A particle of mass 2.0 kg is projected from the origin with an initial velocity of 10 m/s at an angle of 60° to the horizontal. What is the time of flight?

A. 1.0 s

Correct B. 2.0 s

C. 3.0 s

D. 4.0 s

Correct Answer: B

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

Question 3

A heat engine operates between two reservoirs at temperatures 500 K and 300 K. If the engine absorbs 1000 J of heat from the high-temperature reservoir, what is the efficiency?

Correct A. 0.25

B. 0.30

C. 0.35

D. 0.40

Correct Answer: A

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

Question 4

A circuit consists of a 10 Ω resistor, a 20 Ω resistor, and a 5 Ω resistor connected in series. If a 12 V battery is connected across the circuit, what is the current through the 5 Ω resistor?

A. 0.5 A

Correct B. 1.0 A

C. 1.5 A

D. 2.0 A

Correct Answer: B

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

Question 5

A convex lens of focal length 20 cm forms an image of a dis\tant object. If the object is placed at a dis\tance of 30 cm from the lens, what is the magnification?

A. -1.5

Correct B. -2.0

C. -2.5

D. -3.0

Correct Answer: B

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

Question 6

A 5 μF capacitor is connected in series with a 10 kΩ resistor and a 9 V battery. If the switch is closed at t = 0, what is the time cons\tant (τ) of the circuit?

A. 0.5 s

Correct B. 1 s

C. 2 s

D. 5 s

Correct Answer: B

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

Question 7

A particle of mass 2 kg is projected from the origin with an initial velocity of 20 m/s at an angle of 60° above the horizontal. What is the maximum height reached by the particle?

A. 10 m

B. 15 m

Correct C. 20 m

D. 25 m

Correct Answer: C

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

Question 8

A coil of wire with 100 turns and a radius of 0.05 m is placed in a magnetic field of strength 0.5 T. If the current in the coil is 2 A, what is the magnitude of the torque experienced by the coil?

A. 0.1 Nm

B. 0.2 Nm

Correct C. 0.3 Nm

D. 0.4 Nm

Correct Answer: C

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

Question 9

A 10 μF capacitor is connected in parallel with a 20 μF capacitor and a 50 Ω resistor. If the voltage across the circuit is 12 V, what is the current flowing through the resistor?

A. 0.2 A

Correct B. 0.4 A

C. 0.6 A

D. 0.8 A

Correct Answer: B

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

Question 10

A projectile is launched from the origin with an initial velocity of 30 m/s at an angle of 45° above the horizontal. What is the range of the projectile?

A. 20 m

B. 30 m

Correct C. 40 m

D. 50 m

Correct Answer: C

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

Question 11

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/s^2, what is the magnitude of the force acting on the particle?

A. 6 N

B. 8 N

Correct C. 10 N

D. 12 N

Correct Answer: C

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

Question 12

A charged particle of mass 1 kg and charge 2 C is moving in a magnetic field of strength 5 T. If the particle experiences a force of 10 N, what is the magnitude of the velocity of the particle?

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 13

A simple p\endulum of length 2 m is released from an initial angle of 30°. If the p\endulum experiences a damping force of 0.5 N, what is the time period of the p\endulum?

A. 2 s

B. 4 s

Correct C. 6 s

D. 8 s

Correct Answer: C

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

Question 14

A block of mass 5 kg is attached to a horizontal spring of spring cons\tant 10 N/m. If the block is displaced by 2 m from its equilibrium position and released, what is the maximum velocity 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 15

A charged particle of mass 1 kg and charge 2 C is moving in a magnetic field of strength 5 T. If the particle experiences a force of 10 N, what is the magnitude of the velocity of the particle?

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 16

A charged particle of mass 2.0 × 10^-6 kg and charge 3.0 × 10^-6 C is moving in a circular path of radius 0.5 m in a uniform magnetic field of strength 0.2 T. What is the speed of the particle?

A. 10 m/s

B. 20 m/s

Correct C. 30 m/s

D. 40 m/s

Correct Answer: C

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

Question 17

A radioactive sample has an initial activity of 100 Bq. After 5 minutes, its activity decreases to 50 Bq. What is the half-life of the sample?

A. 10 min

Correct B. 20 min

C. 30 min

D. 40 min

Correct Answer: B

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

Question 18

A convex lens of focal length 20 cm is used to form an image of an object placed 30 cm from the lens. What is the magnification of the image?

A. 1

B. 2

Correct C. 3

D. 4

Correct Answer: C

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

Question 19

A block of mass 5 kg is attached to a horizontal spring with a force cons\tant of 100 N/m. The block is displaced by 2 m from its equilibrium position and then released. What is the maximum speed of the block?

A. 10 m/s

B. 20 m/s

Correct C. 30 m/s

D. 40 m/s

Correct Answer: C

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

Question 20

A projectile is launched from the ground with an initial velocity of 50 m/s at an angle of 60° above the horizontal. What is the maximum height reached by the projectile?

A. 25 m

B. 30 m

Correct C. 35 m

D. 40 m

Correct Answer: C

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

Question 21

A gas is enclosed in a container with a movable piston. The gas is heated, cau\sing its pressure to increase. Which of the following best describes the change in the gas's volume?

A. The volume of the gas increases.

B. The volume of the gas decreases.

Correct C. The volume of the gas remains cons\tant.

D. The volume of the gas becomes negative.

Correct Answer: C

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

Question 22

A block of mass 2 kg is attached to a horizontal spring with a force cons\tant of 100 N/m. 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. 1 m/s

Correct B. 2 m/s

C. 4 m/s

D. 5 m/s

Correct Answer: B

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

Question 23

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 the capacitor?

A. 50 μC

Correct B. 100 μC

C. 200 μC

D. 500 μC

Correct Answer: B

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

Question 24

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

Correct A. 12.5 Bq

B. 25 Bq

C. 50 Bq

D. 100 Bq

Correct Answer: A

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

Question 25

A body of mass 5 kg is moving with a velocity of 10 m/s. If the body is subjected to a force of 20 N, what is the acceleration of the body?

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

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