POST UTME UNIOSUN 2018 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A parallel plate capacitor has a capaci\tance of 10 μF and is charged to a potential difference of 20 V. Calculate the energy stored in the capacitor.
A. 0.2 J
B. 0.4 J
C. 0.6 J
D. 0.8 J
Question 2
A wire of resis\tance 10 Ω is connected in series with a 20 Ω resistor and a 30 Ω resistor. What is the total resis\tance of the circuit?
A. 40 Ω
B. 50 Ω
C. 60 Ω
D. 70 Ω
Question 3
A magnetic field of 0.5 T is applied to a current-carrying wire of length 2 m. If the current in the wire is 5 A, calculate the force exerted on the wire.
A. 0.5 N
B. 1 N
C. 2 N
D. 3 N
Question 4
A gas is enclosed in a container with a movable piston. The gas is heated at cons\tant volume. Which of the following statements is true?
A. The pressure of the gas increases.
B. The pressure of the gas decreases.
C. The pressure of the gas remains cons\tant.
D. The pressure of the gas becomes zero.
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 displaced by 2 m from its initial position, calculate the work done by the force acting on the particle.
A. -16 J
B. -8 J
C. 0 J
D. 8 J
Question 6
A rigid rod of length $L$ is pivoted at one \end. The rod is subject to a force $F$ applied at a dis\tance $x$ from the pivot. If the rod is in equilibrium, find the angle $\theta$ between the force $F$ and the rod.
A. \frac{\pi}{4}
B. \frac{\pi}{3}
C. \frac{\pi}{2}
D. \frac{\pi}{6}
Question 7
A 10 Ω resistor is connected in series with a 20 Ω resistor and a 30 Ω resistor. What is the equivalent resis\tance of the circuit?
A. 50 Ω
B. 60 Ω
C. 70 Ω
D. 80 Ω
Question 8
A nucleus of mass number 238 and atomic number 92 undergoes \alpha decay. Calculate the energy released in the process.
A. 5.0 x 10^-12 J
B. 1.0 x 10^-11 J
C. 2.0 x 10^-11 J
D. 3.0 x 10^-11 J
Question 9
A gas is enclosed in a container of volume 2.5 m³ at a temperature of 300 K. If the temperature is increased to 450 K, what is the new volume of the gas, assuming ideal gas behavior?
A. 3.5 m³
B. 4.5 m³
C. 5.5 m³
D. 6.5 m³
Question 10
A particle of mass 1 kg is moving in a circular path of radius 2 m with a cons\tant speed of 3 m/s. If the particle is displaced by 1 m from its initial position, calculate the work done by the force acting on the particle.
A. -6 J
B. -3 J
C. 0 J
D. 3 J
Question 11
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 $F_c = \frac{mv^2}{r}$. If the particle is also subject to a uniform gravitational field of strength $g$, find the angle $\theta$ between the force $F_c$ and the force of gravity $mg$.
A. \frac{\pi}{4}
B. \frac{\pi}{3}
C. \frac{\pi}{2}
D. \frac{\pi}{6}
Question 12
A particle of mass 1.0 kg is confined to a one-dimensional box of length 0.50 m. What is the energy of the ground state?
A. 1.0 x 10^-22 J
B. 1.0 x 10^-21 J
C. 1.0 x 10^-20 J
D. 1.0 x 10^-19 J
Question 13
A nucleus of mass number 238 has a binding energy of 170 MeV. What is the mass defect?
A. 1.0 x 10^-27 kg
B. 1.0 x 10^-26 kg
C. 1.0 x 10^-25 kg
D. 1.0 x 10^-24 kg
Question 14
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 15
A block of mass 2 kg is attached to a horizontal spring with a force cons\tant of 100 N/m. The block is displaced by 0.2 m from its equilibrium position and then released. What is the maximum speed of the block?
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s

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