POST UTME LAUTECH 2021 Physics | Objective

Are you preparing for POST UTME LAUTECH exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2021 Physics (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
A 2 kg block of ice at 0°C is placed in a 10°C water bath. Assuming the specific heat capacity of ice is 2090 J/(kg·K) and the latent heat of fusion of ice is 334,000 J/kg, calculate the time it takes for the ice to melt completely.
A. 10 minutes
B. 20 minutes
Correct C. 30 minutes
D. 40 minutes

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 2
A magnetic field of 0.5 T is applied to a coil of wire with 100 turns and a resis\tance of 10 Ω. If the coil is connected to a 12 V battery, calculate the induced emf in the coil.
A. 0.6 V
B. 1.2 V
Correct C. 2.4 V
D. 3.6 V

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 3
A 50 Hz AC generator produces an emf of 100 V. If the generator is connected to a 10 Ω load, calculate the current flowing through the load.
A. 5 A
Correct B. 10 A
C. 15 A
D. 20 A

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 4
A 5 kg block is moving at 10 m/s on a frictionless surface. If a force of 20 N is applied to the block, calculate the acceleration of the block.
A. 2 m/s^2
B. 4 m/s^2
Correct C. 6 m/s^2
D. 8 m/s^2

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 5
A 10 kg block is susp\ended from a spring with a spring cons\tant of 100 N/m. If the block is displaced by 0.5 m from its equilibrium position, calculate the potential energy stored in the spring.
A. 25 J
B. 50 J
Correct C. 75 J
D. 100 J

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 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 7
A gas occupies a volume of 2.5 L at a pressure of 1.5 atm. If the pressure is increased to 3.0 atm, what is the new volume of the gas?
A. 1.0 L
Correct B. 1.5 L
C. 2.0 L
D. 2.5 L

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 8
A wave has a frequency of 50 Hz and a wavelength of 0.2 m. What is the speed of the wave?
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 9
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 60° above the horizontal. What is the maximum height reached by the projectile?
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 10
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
B. 4 m/s^2
Correct C. 6 m/s^2
D. 8 m/s^2

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 11
A uniform magnetic field of magnitude 2.0 T is directed along the positive z-axis. A current of 5.0 A flows in a circular loop of radius 0.20 m, placed in the x-y plane. What is the magnitude of the magnetic moment of the loop?
A. 0.10 A m^2
Correct B. 0.20 A m^2
C. 0.30 A m^2
D. 0.40 A m^2

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 12
A particle of mass 2.0 kg is moving in a circular path of radius 1.5 m with a speed of 4.0 m/s. What is the magnitude of the force acting on the particle?
A. 10.0 N
Correct B. 20.0 N
C. 30.0 N
D. 40.0 N

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 13
A gas occupies a volume of 2.0 L at a pressure of 1.0 atm. What is the new volume of the gas if the pressure is increased to 2.0 atm?
A. 1.0 L
Correct B. 2.0 L
C. 3.0 L
D. 4.0 L

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 14
A circuit consists of a 10.0 Ω resistor and a 20.0 Ω resistor connected in series. A voltage of 12.0 V is applied across the circuit. What is the current flowing through the circuit?
A. 0.50 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 15
A 5.0 kg block is attached to a horizontal, massless spring with a force cons\tant of 100.0 N/m. The block is displaced by 2.0 m from its equilibrium position and released from rest. What is the speed of the block when it passes through the equilibrium position?
A. 1.0 m/s
Correct B. 2.0 m/s
C. 3.0 m/s
D. 4.0 m/s

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 16
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 subject to a centripetal force of 12 N, what is the magnitude of the force?
A. 10 N
Correct B. 12 N
C. 15 N
D. 20 N

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 17
A 10 μF capacitor is connected in series with a 20 Ω resistor and a 120 V power source. What is the current flowing through the circuit?
A. 0.5 A
Correct B. 1 A
C. 2 A
D. 5 A

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 18
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°
B. 20°
Correct C. 30°
D. 40°

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 19
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 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 20
A 10 μF capacitor is connected in parallel with a 20 μF capacitor. What is the equivalent capaci\tance?
A. 10 μF
B. 20 μF
Correct C. 30 μF
D. 40 μF

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 21
A parallel plate capacitor consists of two plates, each of area 0.04 m^2, separated by a dis\tance of 0.02 m. The space between the plates is filled with a dielectric material of relative permittivity 2.5. If a potential difference of 10 V is applied across the plates, calculate the capaci\tance of the capacitor.
A. 0.02 F
Correct B. 0.04 F
C. 0.06 F
D. 0.08 F

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 22
A body of mass 5 kg is moving in a circular path of radius 2 m with a cons\tant speed of 4 m/s. If the body is subjected to a centripetal force of 10 N, calculate the time taken by the body to complete one revolution.
A. 2 s
Correct B. 4 s
C. 6 s
D. 8 s

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 23
A light ray passes through a prism of angle of re\fraction 30° and angle of incidence 20°. If the angle of emergence is 40°, calculate 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 24
A current of 2 A flows through a resistor of resis\tance 10 Ω. If the potential difference across the resistor is 20 V, calculate the power consumed by the resistor.
A. 4 W
Correct B. 8 W
C. 12 W
D. 16 W

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 25
A body of mass 10 kg is moving in a straight line with a velocity of 5 m/s. If the body is subjected to a force of 20 N, calculate 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