POST UTME LEAD CITY UNIVERSITY 2017 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A sound wave with a frequency of 200 Hz is traveling through a medium with a speed of 340 m/s. What is the wavelength of the sound wave?
A. 1.7 m
B. 1.7 cm
C. 1.7 km
D. 1.7 μm
Question 2
A 50 kg block is pulled up a 10 m long ramp at a cons\tant speed. If the force applied to the block is 100 N, what is the work done on the block?
A. 500 J
B. 1000 J
C. 2000 J
D. 5000 J
Question 3
A 100 V, 50 Hz AC supply is connected to a 20 Ω resistor. What is the rms value of the current flowing through the resistor?
A. 1 A
B. 2 A
C. 5 A
D. 10 A
Question 4
A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in series. Calculate the current flowing through the circuit.
A. 0.5 A
B. 1 A
C. 2 A
D. 3 A
Question 5
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 acceleration of 2 m/s^2, what is the magnitude of the force acting on the particle?
A. 8 N
B. 10 N
C. 12 N
D. 16 N
Question 6
A photon of energy 2.5 eV is incident on a metal surface with a work function of 2 eV. Calculate the maximum kinetic energy of the photoelectron.
A. 0.5 eV
B. 1 eV
C. 1.5 eV
D. 2 eV
Question 7
A ray 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°
C. 30°
D. 40°
Question 8
A heat engine operates between two temperatures of 500 K and 300 K. If the efficiency of the engine is 30%, what is the work done by the engine per cycle?
A. 100 J
B. 200 J
C. 300 J
D. 400 J
Question 9
A block of mass 5.0 kg is attached to a horizontal, massless spring with a force cons\tant of 200 N/m. The block is displaced by 0.20 m from its equilibrium position and released from rest. What is the maximum speed of the block?
A. 0.50 m/s
B. 1.0 m/s
C. 2.0 m/s
D. 4.0 m/s
Question 10
A solid cylindrical block of wood has a radius of 0.05 m and a height of 0.2 m. If the density of wood is 500 kg/m³, calculate the weight of the block in Newtons.
A. 10 N
B. 20 N
C. 30 N
D. 40 N
Question 11
A block of mass 5 kg is attached to a horizontal, massless spring with a force cons\tant of 200 N/m. The block is displaced by 2 m from its equilibrium position and released from rest. What is the maximum speed of the block as it passes through the equilibrium position?
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s
Question 12
A lens has a focal length of 20 cm and is used to form an image of an object placed 30 cm away. If the object is moved to a dis\tance of 40 cm, what is the new image dis\tance?
A. 10 cm
B. 20 cm
C. 30 cm
D. 40 cm
Question 13
A \tank contains 100 L of water at a temperature of 20°C. If 10 L of water at 80°C is added to the \tank, what is the final temperature of the water in the \tank?
A. 22°C
B. 25°C
C. 28°C
D. 30°C
Question 14
A radioactive sample has an initial activity of 100 Bq. If the half-life of the sample is 10 minutes, calculate the activity of the sample after 20 minutes.
A. 50 Bq
B. 75 Bq
C. 100 Bq
D. 125 Bq
Question 15
A 100 W light bulb is connected to a 120 V power source. What is the current drawn by the bulb?
A. 0.50 A
B. 1.0 A
C. 2.0 A
D. 4.0 A

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: