POST UTME JOSEPH AYO BABALOLA UNIVERSITY 2023 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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 2
A block of mass 5 kg is placed on a frictionless surface and attached to a horizontal spring with a force cons\tant of 20 N/m. If the block is displaced by 0.5 m from its equilibrium position and released from rest, what is the maximum velocity of the block?
A. 1 m/s
B. 2 m/s
C. 3 m/s
D. 4 m/s
Question 3
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 4
A circuit consists of a $10\Omega$ resistor, a $20\Omega$ resistor, and a $5\Omega$ resistor connected in series. If a voltage of $12\text{V}$ is applied across the circuit, what is the current through the $5\Omega$ resistor?
A. $\frac{12}{35}\text{A}$
B. $\frac{12}{25}\text{A}$
C. $\frac{12}{45}\text{A}$
D. $\frac{12}{55}\text{A}$
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 force of 12 N, what is the angular velocity of the particle?
A. 2 rad/s
B. 4 rad/s
C. 6 rad/s
D. 8 rad/s
Question 6
A body of mass 10 kg is moving with a velocity of 20 m/s. If it is subjected to a force of 30 N, calculate the acceleration produced in the body.
A. 3 m/s^2
B. 6 m/s^2
C. 9 m/s^2
D. 12 m/s^2
Question 7
A wave of wavelength 2 m and frequency 5 Hz is traveling through a medium. If the wave is reflected from a fixed \end, what is the amplitude of the reflected wave?
A. 0.5 m
B. 1 m
C. 1.5 m
D. 2 m
Question 8
A parallel plate capacitor has a capaci\tance of 2.5 μF. If a potential difference of 10 V is applied across the plates, calculate the charge stored on the capacitor. Assume the dielectric cons\tant of the material between the plates is 3.
A. 6.25 μC
B. 12.5 μC
C. 25 μC
D. 50 μC
Question 9
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 10
A light source is placed 2 m away from a convex lens of focal length 1 m. If the light source is moved 1 m closer to the lens, what is the new image dis\tance?
A. 1 m
B. 2 m
C. 3 m
D. 4 m
Question 11
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 12
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 13
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 14
A point charge of +2 μC is placed at the origin of a coordinate system. A second point charge of -3 μC is placed at a dis\tance of 0.5 m from the origin. What is the magnitude of the electric field at a point 0.2 m from the origin, on the line connecting the two charges?
A. 0.5 N/C
B. 1.0 N/C
C. 1.5 N/C
D. 2.0 N/C
Question 15
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

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