POST UTME RSU 2020 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 2.5 mH inductor is connected in series with a 3.2 kΩ resistor and a 10 V battery. If the initial current is 0 A, find the current at t = 5 s.
A. 0.5 A
B. 1.0 A
C. 1.5 A
D. 2.0 A
Question 2
A spring of force cons\tant 100 N/m is stretched by 2 m. The potential energy stored in the spring is
A. 200 J
B. 400 J
C. 600 J
D. 800 J
Question 3
A 5.0 mH inductor is connected in series with a 10 Ω resistor across a 12 V DC source. If the current in the circuit is 2.0 A, calculate the voltage drop across the inductor.
A. 10 V
B. 20 V
C. 30 V
D. 40 V
Question 4
A wave function $\psi(x) = Ae^{ikx}$ represents a particle of mass $m$ moving in one dimension. If the particle's energy is $E$, what is its momentum $p$?
A. \frac{E}{c}
B. \hbar k
C. \frac{E}{v}
D. \frac{E}{m}
Question 5
A particle of mass 2 kg is projected from the origin with an initial velocity of 20 m/s at an angle of 60° to the horizontal. If the particle is subject to a uniform gravitational field of 10 m/s², calculate the time taken for the particle to reach its maximum height.
A. 2.5 s
B. 3.33 s
C. 4 s
D. 5 s
Question 6
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. What is the magnitude of the centripetal acceleration?
A. 4 m/s^2
B. 8 m/s^2
C. 12 m/s^2
D. 16 m/s^2
Question 7
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. 10 Ω
B. 12 Ω
C. 14 Ω
D. 16 Ω
Question 8
A radioactive sample decays at a rate of 0.05% per hour. If the initial mass of the sample is 100 g, calculate the mass of the sample after 5 hours.
A. 90 g
B. 95 g
C. 98 g
D. 99 g
Question 9
A beam of light passes through a prism and is re\fracted. If the angle of incidence is 30° and the angle of re\fraction is 20°, what is the angle of deviation?
A. 10°
B. 20°
C. 30°
D. 40°
Question 10
A parallel plate capacitor has plates of area 0.04 m^2 and separation 0.02 m. If the capaci\tance is 8 x 10^-6 F, what is the value of the dielectric cons\tant?
A. 1.25
B. 1.5
C. 2.0
D. 2.5
Question 11
A heat engine operates between the temperatures 300 K and 400 K. The efficiency of the engine is
A. 0.2
B. 0.3
C. 0.4
D. 0.5
Question 12
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 statements is true about the behavior of the gas?
A. The volume of the gas decreases.
B. The temperature of the gas increases.
C. The pressure of the gas increases.
D. The number of moles of the gas decreases.
Question 13
A body of mass 5 kg is moving with a velocity of 10 m/s. 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 14
A gas expands from an initial volume $V_1$ to a final volume $V_2$ at a cons\tant temperature $T$. If the gas's initial pressure is $P_1$, what is its final pressure $P_2$?
A. \frac{P_1V_1}{V_2}
B. \frac{P_1V_2}{V_1}
C. \frac{P_1V_1^2}{V_2}
D. \frac{P_1V_2^2}{V_1}
Question 15
A 5 kg block is attached to a horizontal spring with a force cons\tant of 100 N/m. If the block is displaced by 2 m from its equilibrium position and released from rest, find the maximum speed of the block.
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s

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: