POST UTME OAU 2019 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 total resis\tance of the circuit?
A. 6 Ω
B. 8 Ω
C. 10 Ω
D. 12 Ω
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 experiences a centripetal force of 12 N, what is the magnitude of the force?
A. 8 N
B. 12 N
C. 16 N
D. 24 N
Question 3
A body 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 force acting on the body.
A. 10 N
B. 12 N
C. 15 N
D. 20 N
Question 4
A 100 W light bulb is connected to a 220 V power source. What is the current drawn by the bulb?
A. 0.25 A
B. 0.5 A
C. 0.75 A
D. 1 A
Question 5
A radioactive sample of Uranium-238 undergoes \alpha decay. If the initial mass of the sample is 100 g, and the mass of the \alpha particle is 4 u, what is the mass of the daughter nucleus after 10 half-lives?
A. 92 g
B. 96 g
C. 98 g
D. 100 g
Question 6
A spring with a spring cons\tant of 100 N/m is stretched by 2 m. What is the work done in stretching the spring?
A. 200 J
B. 400 J
C. 600 J
D. 800 J
Question 7
A particle of mass 1 kg is moving in a circular path of radius 2 m with a speed of 4 m/s. If the particle is subject to a centripetal force of 10 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 8
A block of mass $m$ is attached to a horizontal spring with spring cons\tant $k$. The block is displaced by a dis\tance $x$ from its equilibrium position and released from rest. Assuming the block undergoes simple harmonic motion, what is the maximum speed $v_{max}$ of the block?
A. \sqrt{\frac{kx^2}{m}}
B. \frac{kx^2}{m}
C. \frac{2kx^2}{m}
D. \frac{3kx^2}{m}
Question 9
A particle of mass $m$ is moving in a circular path of radius $r$ with a cons\tant speed $v$. The particle is subject to a centripetal force $F_c$ given by $F_c = \frac{mv^2}{r}$. If the particle's speed is doubled to $2v$, what is the new centripetal force $F_{c,new}$?
A. \frac{2mv^2}{r}
B. \frac{mv^2}{r}
C. \frac{4mv^2}{r}
D. \frac{mv^2}{2r}
Question 10
A gas is enclosed in a container with a movable piston. The gas is heated, cau\sing its pressure to increase. Which of the following is a correct statement about the behavior of the gas?
A. The gas expands to fill the container.
B. The gas contracts to occupy less space.
C. The gas does not change volume.
D. The gas expands and occupies more space.
Question 11
A capacitor is connected in series with a resistor and a battery. The capacitor has a capaci\tance of 2 μF and the battery has a voltage of 12 V. If the resistor has a resis\tance of 4 Ω, what is the current flowing through the circuit?
A. 1 A
B. 2 A
C. 3 A
D. 4 A
Question 12
A 5 μF capacitor is connected in parallel with a 10 μF capacitor. What is the equivalent capaci\tance of the circuit?
A. 5 μF
B. 10 μF
C. 15 μF
D. 20 μF
Question 13
A parallel plate capacitor has plates of area 0.04 m^2 and separation 0.02 m. If the dielectric cons\tant of the material between the plates is 3, calculate the capaci\tance.
A. 0.02 F
B. 0.04 F
C. 0.06 F
D. 0.08 F
Question 14
A parallel plate capacitor has a capaci\tance of 3 μF and a plate separation of 2 mm. If a potential difference of 10 V is applied across the plates, what is the electric field between them?
A. 500 V/m
B. 1000 V/m
C. 2000 V/m
D. 5000 V/m
Question 15
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°

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Help others prepare! Share this practice hub: