POST UTME EKSU 2019 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 2.0 kg block is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. The block is displaced by 0.20 m from its equilibrium position and released from rest. What is the speed of the block when it passes through its equilibrium position?
A. 0.20 m/s
B. 0.50 m/s
C. 1.0 m/s
D. 1.5 m/s
Question 2
A 10 kg block is attached to a horizontal spring with a spring cons\tant of 100 N/m. If the block is displaced by 0.2 m from its equilibrium position and released, what is the maximum speed of the block?
A. 0.5 m/s
B. 1.0 m/s
C. 1.5 m/s
D. 2.0 m/s
Question 3
A parallel plate capacitor has a capaci\tance of $C = 2 \times 10^{-6} , \text{F}$ and is charged to a potential difference of $V = 10 , \text{V}$. If the plates are separated by a dis\tance of $d = 0.1 , \text{m}$, determine the electric field between the plates.
A. \( E = \frac{V}{d} \)
B. \( E = \frac{V}{2d} \)
C. \( E = \frac{V}{d^2} \)
D. \( E = \frac{V}{2d^2} \)
Question 4
A sound wave with a frequency of 200 Hz and a wavelength of 0.5 m is traveling through a medium with a speed of 340 m/s. Calculate the amplitude of the wave if the intensity is 10^-6 W/m^2.
A. 10^-6 m
B. 10^-5 m
C. 10^-4 m
D. 10^-3 m
Question 5
A gas expands from an initial volume of 0.1 m^3 to a final volume of 0.5 m^3 at a cons\tant temperature of 300 K. Calculate the work done by the gas if the pressure is 100 kPa.
A. 50 J
B. 100 J
C. 200 J
D. 500 J
Question 6
A 2 μF capacitor is connected in series with a 10 kΩ resistor. A 100 V DC supply is connected across the circuit. Calculate the time cons\tant of the circuit.
A. 0.1 s
B. 0.2 s
C. 0.5 s
D. 1 s
Question 7
A particle of mass 2 kg is moving in a circular path with a cons\tant speed of 4 m/s. If the radius of the path is 3 m, calculate the magnitude of the force acting on the particle.
A. 8 N
B. 12 N
C. 16 N
D. 20 N
Question 8
A light ray passes through a prism and is re\fracted at an angle of 30°. If the angle of incidence is 20°, what is the angle of emergence?
A. 10°
B. 20°
C. 30°
D. 40°
Question 9
A 100 W light bulb is connected to a 220 V AC source. If the power factor of the bulb is 0.8, what is the current drawn by the bulb?
A. 0.5 A
B. 1.0 A
C. 1.5 A
D. 2.0 A
Question 10
A sound wave with a frequency of 200 Hz and a wavelength of 1.5 m is traveling through a medium. What is the speed of the sound wave?
A. 300 m/s
B. 400 m/s
C. 500 m/s
D. 600 m/s
Question 11
A 0.50 kg object is moving in a circular path with a radius of 0.20 m. If the object has a speed of 2.0 m/s, what is the magnitude of the centripetal acceleration?
A. 0.20 m/s²
B. 0.50 m/s²
C. 1.0 m/s²
D. 1.5 m/s²
Question 12
A particle of mass 2.0 kg is moving in a circular path of radius 3.0 m with a cons\tant speed of 4.0 m/s. What is the magnitude of the net force acting on the particle?
A. 2.0 N
B. 4.0 N
C. 6.0 N
D. 8.0 N
Question 13
A radioactive sample has a half-life of 10 minutes. If the initial activity is 100 Bq, what is the activity after 20 minutes?
A. 20 Bq
B. 40 Bq
C. 60 Bq
D. 80 Bq
Question 14
A 50 Hz AC supply is connected across a series R-L circuit with R = 20 Ω and L = 0.2 H. Calculate the power factor of the circuit.
A. 0.5
B. 0.6
C. 0.7
D. 0.8
Question 15
A capacitor of capaci\tance 10 μF is connected in series with a resistor of resis\tance 20 Ω. If a voltage of 50 V is applied across the circuit, calculate the current flowing through the circuit.
A. 0.25 A
B. 0.5 A
C. 1 A
D. 2 A

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: