POST UTME LEAD CITY UNIVERSITY 2021 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A parallel plate capacitor has plates of area 0.04 m^2 and separation 0.02 m. If the capaci\tance is 2.5 x 10^-10 F, what is the charge on the plates when the potential difference between them is 100 V?
A. 1.25 x 10^-8 C
B. 2.5 x 10^-8 C
C. 5.0 x 10^-8 C
D. 7.5 x 10^-8 C
Question 2
A 1000 Ω resistor is connected in series with a 200 V battery. If the internal resis\tance of the battery is 10 Ω, what is the current flowing through the circuit?
A. 0.2 A
B. 0.25 A
C. 0.3 A
D. 0.35 A
Question 3
A 100 Ω resistor is connected in series with a 20 μF capacitor and a 50 Hz AC source. What is the impedance of the circuit?
A. 120 Ω
B. 140 Ω
C. 160 Ω
D. 180 Ω
Question 4
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 wave's velocity?
A. Positive x-direction
B. Negative x-direction
C. Positive y-direction
D. Negative y-direction
Question 5
A body is at rest on a horizontal surface. What is the net force acting on the body?
A. 0 N
B. 10 N
C. 20 N
D. 30 N
Question 6
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. 10 m
B. 15 m
C. 20 m
D. 25 m
Question 7
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. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2
Question 8
A particle of mass 0.5 kg is moving in a circular path of radius 2 m with a speed of 4 m/s. What is the magnitude of the centripetal acceleration?
A. 0.5 m/s^2
B. 1.0 m/s^2
C. 2.0 m/s^2
D. 4.0 m/s^2
Question 9
A capacitor consists of two parallel plates, each of area 0.1 m^2, separated by a dis\tance of 0.01 m. If the capaci\tance is 10 μF, calculate the charge stored on the capacitor when a potential difference of 5 V is applied across it.
A. 50 μC
B. 100 μC
C. 200 μC
D. 500 μC
Question 10
A 5.0 kg block is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. The block is displaced by 2.0 m from its equilibrium position and released from rest. What is the frequency of the resulting simple harmonic motion?
A. 1.0 Hz
B. 2.0 Hz
C. 3.0 Hz
D. 4.0 Hz
Question 11
A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in parallel. What is the total resis\tance of the circuit?
A. 2 Ω
B. 3 Ω
C. 4 Ω
D. 6 Ω
Question 12
A ray of light passes through a prism and is re\fracted. If the angle of incidence is 30° and the angle of re\fraction is 40°, what is the angle of deviation?
A. 10°
B. 20°
C. 30°
D. 40°
Question 13
A block of mass 5 kg is placed on a horizontal, frictionless surface. A horizontal force of 10 N is applied to the block, cau\sing it to accelerate. If the block is displaced by 2 m in 3 s, what is the work done by the force?
A. 20 J
B. 30 J
C. 40 J
D. 50 J
Question 14
A particle of mass 2 kg is attached to a spring with a spring cons\tant of 100 N/m. If the particle is displaced by 0.2 m from its equilibrium position and released from rest, calculate the maximum speed of the particle.
A. 2.0 m/s
B. 1.0 m/s
C. 4.0 m/s
D. 3.0 m/s
Question 15
A block of mass 3 kg is placed on a frictionless surface and attached to a horizontal spring with a force cons\tant of 150 N/m. If the block is displaced by 0.1 m from its equilibrium position and released from rest, what is the period of the block's motion?
A. 0.5 s
B. 1 s
C. 1.5 s
D. 2 s

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