POST UTME UNILAG 2022 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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 oscillates?
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s
Question 2
A circuit consists of a 10 Ω resistor, a 20 Ω resistor, and a 30 Ω resistor connected in series. If a voltage of 120 V is applied across the circuit, what is the current flowing through the circuit?
A. 2 A
B. 4 A
C. 6 A
D. 8 A
Question 3
A projectile is launched from the ground with an initial velocity of 30 m/s at an angle of 45° above the horizontal. What is the range of the projectile?
Question 4
A block of mass 2 kg is moving in a circular path of radius 4 m with a cons\tant speed of 8 m/s. If the block is subjected to a centripetal force of 24 N, what is the magnitude of the acceleration of the block?
A. 4 m/s^2
B. 6 m/s^2
C. 8 m/s^2
D. 10 m/s^2
Question 5
A spring with a force cons\tant of 100 N/m is stretched by 2 m. What is the potential energy stored in the spring?
A. 100 J
B. 200 J
C. 300 J
D. 400 J
Question 6
A convex lens of focal length 20 cm is used to form an image of an object placed 30 cm away. What is the magnification of the image?
A. 0.5
B. 1.0
C. 1.5
D. 2.0
Question 7
A 100 V AC supply is connected across a 20 Ω resistor. If the frequency of the AC supply is 50 Hz, what is the rms value of the current?
A. 2.5 A
B. 5.0 A
C. 7.5 A
D. 10.0 A
Question 8
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 30° above the horizontal. What is the maximum height reached by the projectile?
A. 5 m
B. 10 m
C. 15 m
D. 20 m
Question 9
A 5 Ω resistor is connected in parallel with a 10 Ω resistor. What is the equivalent resis\tance of the circuit?
A. 3.33 Ω
B. 4.17 Ω
C. 5.00 Ω
D. 6.25 Ω
Question 10
A particle of mass 2 kg is attached to a spring with a spring cons\tant of 100 N/m. It is displaced by 0.2 m from its equilibrium position and released from rest. Assuming the motion is simple harmonic, calculate the total energy of the particle at time t = 0.
A. 10 J
B. 20 J
C. 30 J
D. 40 J
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 is subjected to a centripetal force of 12 N, what is the angle between the force and the radius vector?
A. 30°
B. 45°
C. 60°
D. 90°
Question 12
A particle of mass 2 kg is moving in a circular path of radius 3 m with a speed of 4 m/s. What is the magnitude of the centripetal force?
A. 10 N
B. 20 N
C. 30 N
D. 40 N
Question 13
A block of mass 5 kg is moving with a velocity of 10 m/s on a frictionless surface. Calculate the work done by the force of gravity on the block as it moves 2 m upwards.
A. 50 J
B. 60 J
C. 70 J
D. 80 J
Question 14
A 5 Ω resistor is connected in series with a 10 Ω resistor and a 15 V battery. What is the current flowing through the 5 Ω resistor?
A. 0.5 A
B. 1.0 A
C. 1.5 A
D. 2.0 A
Question 15
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 acceleration of the particle?
A. 8 m/s^2
B. 12 m/s^2
C. 16 m/s^2
D. 20 m/s^2

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