POST UTME UNIOSUN 2019 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A simple harmonic motion has a maximum displacement of 5 m and a period of 2 s. What is the angular frequency of the motion?
A. 1.57 rad/s
B. 3.14 rad/s
C. 6.28 rad/s
D. 9.42 rad/s
Question 2
A 100 μF capacitor is connected in series with a 10 kΩ resistor and a 9 V battery. If the capacitor is initially uncharged, what is the time cons\tant of the circuit?
A. 1 ms
B. 10 ms
C. 100 ms
D. 1 s
Question 3
A beam of light is incident on a glass slab at an angle of 30°. If the re\fractive index of the glass is 1.5, what is the angle of re\fraction?
A. 20°
B. 25°
C. 30°
D. 35°
Question 4
A photon of energy 2 eV is incident on a metal surface with a work function of 1.5 eV. Assuming the photon is absorbed by the metal, calculate the maximum kinetic energy of the electron emitted.
A. 0.5 eV
B. 1.0 eV
C. 1.5 eV
D. 2.0 eV
Question 5
A sound wave has a frequency of 200 Hz and a wavelength of 0.5 m. What is the speed of the sound wave?
A. 50 m/s
B. 75 m/s
C. 100 m/s
D. 150 m/s
Question 6
A particle of mass 0.5 kg is attached to a spring with a spring cons\tant of 20 N/m. If the particle is displaced by 0.2 m from its equilibrium position and released from rest, what is its angular frequency?
A. 0.5 rad/s
B. 1.0 rad/s
C. 1.5 rad/s
D. 2.0 rad/s
Question 7
A 100 g mass is attached to a spring with a spring cons\tant of 10 N/m. What is the frequency of the simple harmonic motion?
A. 0.5 Hz
B. 1 Hz
C. 2 Hz
D. 5 Hz
Question 8
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 0.2 m from its equilibrium position and released from rest. Assuming the block undergoes simple harmonic motion, calculate the maximum speed of the block.
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s
Question 9
A wave of frequency 100 Hz and amplitude 2 m is traveling through a medium with a speed of 300 m/s. Calculate the wavelength of the wave.
A. 1 m
B. 2 m
C. 3 m
D. 4 m
Question 10
A light source is placed 2 m away from a convex lens of focal length 0.5 m. If the object is moved 1 m closer to the lens, calculate the new image dis\tance.
A. 1.5 m
B. 2 m
C. 2.5 m
D. 3 m
Question 11
A quantum particle has a wave function given by ψ(x) = Ae^\( -αx^2 \). What is the expectation value of the position operator?
A. 0
B. 1/α
C. 1/2α
D. 1/4α
Question 12
A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in series. What is the current in the circuit?
A. 1 A
B. 2 A
C. 3 A
D. 4 A
Question 13
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. Calculate the magnitude of the centripetal force acting on the particle.
A. 10 N
B. 20 N
C. 30 N
D. 40 N
Question 14
A current of 5 A flows through a resistor of 2 Ω. If the voltage across the resistor is 20 V, what is the power consumed by the resistor?
A. 10 W
B. 20 W
C. 30 W
D. 50 W
Question 15
A parallel plate capacitor has a capaci\tance of 2 μF and is charged to a potential difference of 10 V. If a dielectric material with a dielectric cons\tant of 3 is inserted between the plates, what is the new capaci\tance?
A. 2 μF
B. 4 μF
C. 6 μF
D. 8 μF

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