POST UTME BABCOCK UNIVERSITY 2023 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A wave has a frequency of 50 Hz and a wavelength of 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 2
A current of 2 A flows through a resistor of 4 Ω. If the voltage across the resistor is 12 V, what is the power dissipated by the resistor?
A. 2 W
B. 4 W
C. 6 W
D. 8 W
Question 3
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. Assuming the block undergoes simple harmonic motion, what is the maximum speed of the block?
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s
Question 4
A sound wave with a frequency of 200 Hz and an amplitude of 0.5 m is traveling through a medium with a speed of 340 m/s. If the wave is reflected off a fixed \end, what is the maximum displacement of the wave at the fixed \end?
A. 0 m
B. 0.5 m
C. 1 m
D. 1.5 m
Question 5
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 30° above the horizontal. If the air resis\tance is negligible, what is the maximum height reached by the projectile?
A. 4.9 m
B. 5.1 m
C. 6.3 m
D. 7.5 m
Question 6
A 2 kg block is moving at a speed of 4 m/s on a frictionless surface. Calculate the kinetic energy of the block.
A. 8 J
B. 16 J
C. 24 J
D. 32 J
Question 7
A convex lens of focal length 20 cm is used to form an image of an object placed 30 cm in front of it. What is the magnification of the lens?
A. -0.5
B. -1
C. -1.5
D. -2
Question 8
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 acceleration of 2 m/s^2, what is the magnitude of the force acting on the particle?
A. 8 N
B. 10 N
C. 12 N
D. 16 N
Question 9
A sound wave with a frequency of 200 Hz and a speed of 340 m/s is traveling through a medium. Calculate the wavelength of the sound wave.
A. 1.7 m
B. 1.8 m
C. 1.9 m
D. 2.0 m
Question 10
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 60° above the horizontal. Assuming the only force acting on the projectile is gravity, what is the maximum height reached by the projectile?
A. 10 m
B. 20 m
C. 30 m
D. 40 m
Question 11
A radioactive sample has a half-life of 5 years. If the initial activity of the sample is 100 Bq, what is the activity of the sample after 10 years?
A. 12.5 Bq
B. 25 Bq
C. 50 Bq
D. 100 Bq
Question 12
A particle of mass 2 kg is moving in a circular path with a radius of 3 m. If the particle completes one revolution in 2 s, calculate its angular velocity.
A. 3.14 rad/s
B. 6.28 rad/s
C. 9.42 rad/s
D. 12.57 rad/s
Question 13
A 5 μC charge is placed at the center of a circular loop of radius 0.1 m. Find the electric field at a point on the loop 0.05 m from the center.
A. 100 N/C
B. 200 N/C
C. 300 N/C
D. 400 N/C
Question 14
A particle of mass $m$ is moving in a circular path of radius $r$ with a cons\tant speed $v$. If the particle is subjected to a centripetal force $F_c = \frac{mv^2}{r}$, what is the magnitude of the acceleration of the particle?
A. \frac{v^2}{r}
B. \frac{mv^2}{r^2}
C. \frac{mv^2}{r}
D. \frac{v^3}{r}
Question 15
A gas occupies a volume of 2 L at a pressure of 1 atm and a temperature of 300 K. If the pressure is increased to 2 atm and the temperature is decreased to 200 K, what is the new volume of the gas?
A. 1 L
B. 2 L
C. 4 L
D. 8 L

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