POST UTME JOSEPH AYO BABALOLA UNIVERSITY 2023 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A simple harmonic motion is described by the equation x(t) = 2 \sin\( 3t + π/4 \). What is the amplitude of the motion?
A. 2 m
B. 4 m
C. 6 m
D. 8 m
Question 2
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 net force acting on the particle?
A. 10 N
B. 12 N
C. 16 N
D. 20 N
Question 3
A light ray passes from air into a glass slab of re\fractive index 1.5. If the angle of incidence is 30°, what is the angle of re\fraction?
A. 20°
B. 25°
C. 30°
D. 35°
Question 4
A capacitor of capaci\tance 10 μF is connected across a 200 V supply. Calculate the charge stored in the capacitor.
A. 2 C
B. 4 C
C. 6 C
D. 8 C
Question 5
A body of mass 5 kg is moving with a velocity of 10 m/s. If it 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
C. 6 m/s^2
D. 8 m/s^2
Question 6
A particle of mass $m$ is confined to a one-dimensional box of length $L$. If the particle is in the ground state, what is the expectation value of its position?
A. $\frac{L}{2}$
B. $\frac{L}{4}$
C. $\frac{3L}{4}$
D. $\frac{L}{\sqrt{2}}$
Question 7
A convex lens of focal length 20 cm is placed in contact with a concave lens of focal length -15 cm. What is the focal length of the combination?
A. 10 cm
B. 15 cm
C. 20 cm
D. 30 cm
Question 8
A light source is placed 2 m away from a convex lens with a focal length of 0.5 m. If the light source is moved 1 m closer to the lens, what is the new image dis\tance?
A. 1.5 m
B. 2 m
C. 2.5 m
D. 3 m
Question 9
A 2-pole, 4-wire, star-connected alternator has an induced emf of 220 V. If the frequency of the supply is 50 Hz, calculate the value of the current drawn from the alternator.
A. 4 A
B. 8 A
C. 10 A
D. 12 A
Question 10
A particle of mass 3 kg is moving in a straight line with a velocity of 6 m/s. If the particle is subjected to a force of 15 N, what is 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 11
A particle of mass 1 kg is moving in a straight line with a velocity of 5 m/s. If the particle is subjected to a force of 10 N, what is the acceleration of the particle?
A. 0.5 m/s^2
B. 1 m/s^2
C. 2 m/s^2
D. 5 m/s^2
Question 12
A ray of light passes from air into a glass block with a re\fractive index of 1.5. If the angle of incidence is 30°, what is the angle of re\fraction?
A. 20°
B. 25°
C. 30°
D. 35°
Question 13
A heat engine operates between two temperatures of 300 K and 400 K. If the engine has an efficiency of 30%, what is the temperature of the hot reservoir?
A. 350 K
B. 400 K
C. 450 K
D. 500 K
Question 14
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 15
A projectile is launched from the ground with an initial velocity of $20\text{m/s}$ at an angle of $30^\circ$ above the horizontal. If the air resis\tance is negligible, what is the maximum height reached by the projectile?
A. $10\text{m}$
B. $15\text{m}$
C. $20\text{m}$
D. $25\text{m}$

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