POST UTME RSU 2022 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in series. What is the current flowing through the circuit?
A. 1.0 A
B. 2.0 A
C. 3.0 A
D. 4.0 A
Question 2
A circuit consists of a 12 V battery, a 4 Ω resistor, and an unknown resistor. If the current in the circuit is 2 A, what is the value of the unknown resistor?
A. 2 Ω
B. 4 Ω
C. 6 Ω
D. 8 Ω
Question 3
A wave is traveling through a medium with a speed of 300 m/s. If the frequency of the wave is 50 Hz, what is the wavelength of the wave?
A. 6 m
B. 12 m
C. 15 m
D. 20 m
Question 4
A 5 kg block is moving with a velocity of 10 m/s. Calculate the kinetic energy of the block.
A. 25 J
B. 50 J
C. 75 J
D. 100 J
Question 5
A heat engine operates between a high-temperature reservoir at 500 K and a low-temperature reservoir at 300 K. If the engine has an efficiency of 30%, what is the maximum possible work output of the engine?
A. 1000 J
B. 2000 J
C. 3000 J
D. 4000 J
Question 6
A parallel plate capacitor has plates of area 0.04 m^2 and separation 0.02 m. If the capaci\tance is 8.0 x 10^-10 F, what is the dielectric cons\tant of the material between the plates?
A. 1.0
B. 2.0
C. 3.0
D. 4.0
Question 7
A car travels from rest to a speed of 25 m/s in 10 s. What is the acceleration of the car?
A. 2 m/s^2
B. 5 m/s^2
C. 10 m/s^2
D. 20 m/s^2
Question 8
A heat engine operates between temperatures of 500 K and 300 K. What is the efficiency of the engine?
A. 0.25
B. 0.33
C. 0.5
D. 0.67
Question 9
A particle of mass $m$ is moving in a circular path of radius $r$ with a cons\tant speed $v$. Find the magnitude of the force acting on the particle.
A. F = \frac{m v^2}{r}
B. F = \frac{m r^2}{v}
C. F = \frac{v^2}{m r}
D. F = \frac{r^2}{m v}
Question 10
A gas is enclosed in a container with a movable piston. The gas is heated, cau\sing its temperature to increase. Which of the following statements is true about the behavior of the gas?
A. The volume of the gas decreases.
B. The pressure of the gas increases.
C. The number of moles of the gas increases.
D. The temperature of the gas remains cons\tant.
Question 11
A ray of light 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. 30°
C. 40°
D. 50°
Question 12
A particle is moving in a circular path with a cons\tant speed. Which of the following statements is true about the particle?
A. The particle is accelerating.
B. The particle is decelerating.
C. The particle is moving in a straight line.
D. The particle is at rest.
Question 13
A photon of wavelength 600 nm is incident on a metal surface. If the work function of the metal is 2.0 eV, what is the maximum kinetic energy of the emitted electron?
A. 1.0 eV
B. 2.0 eV
C. 3.0 eV
D. 4.0 eV
Question 14
A parallel plate capacitor has a capaci\tance of 10 μF. If a potential difference of 20 V is applied across it, what is the charge stored on the plates?
A. 2 μC
B. 20 μC
C. 200 μC
D. 2000 μC
Question 15
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 image?
A. -0.5
B. -1
C. -2
D. -3

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