POST UTME AL-HIKMAH UNIVERSITY 2022 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A particle of mass 0.5 kg is moving in a circular path of radius 2.0 m with a cons\tant speed of 4.0 m/s. What is the magnitude of the net force acting on the particle?
A. 10.0 N
B. 20.0 N
C. 30.0 N
D. 40.0 N
Question 2
A gas at a pressure of 2 atm and temperature of 300 K is allowed to expand isothermally to a pressure of 1 atm. What is the final volume of the gas?
A. 0.5 m^3
B. 1 m^3
C. 2 m^3
D. 4 m^3
Question 3
A 100 μC charge is moving in a circular path of radius 0.5 m with a cons\tant speed of 2.0 m/s. What is the magnitude of the magnetic field at the center of the circle?
A. 0.1 T
B. 0.2 T
C. 0.3 T
D. 0.4 T
Question 4
A 2.5 m long wire of resis\tance 3.0 Ω is connected in series with a 6.0 V battery. If the wire is stretched to 4.0 m, what is the new resis\tance?
A. 2.0 Ω
B. 3.0 Ω
C. 4.0 Ω
D. 6.0 Ω
Question 5
A 12 V battery is connected in series with a 4 Ω resistor and a 6 Ω resistor. Calculate the current flowing through the circuit.
A. 1 A
B. 2 A
C. 3 A
D. 4 A
Question 6
A 12 V battery is connected in series with a 4 Ω resistor and a 6 Ω resistor. Calculate the current flowing through the circuit.
A. 1 A
B. 2 A
C. 3 A
D. 4 A
Question 7
A particle of mass $m$ is attached to a spring with spring cons\tant $k$. The particle is displaced by a dis\tance $x$ from its equilibrium position and released from rest. Assuming the motion is simple harmonic, determine the angular frequency $omega$ of the particle's motion.
A. ω = √\( k/m \)
B. ω = √\( m/k \)
C. ω = √\( k/m^2 \)
D. ω = √\( m^2/k \)
Question 8
A 100 μF capacitor is connected in parallel with a 200 Ω resistor. If the voltage across the capacitor is 50 V, calculate the current flowing through the resistor.
A. 0.25 A
B. 0.5 A
C. 1 A
D. 2 A
Question 9
A sound wave with a frequency of 200 Hz has a wavelength of 1.5 m. What is the speed of the sound wave?
A. 300 m/s
B. 600 m/s
C. 1200 m/s
D. 2400 m/s
Question 10
A 100 μF capacitor is connected in parallel with a 200 Ω resistor. If the voltage across the capacitor is 50 V, calculate the current flowing through the resistor.
A. 0.25 A
B. 0.5 A
C. 1 A
D. 2 A
Question 11
A radioactive sample has a half-life of 10 years. If the initial activity of the sample is 1000 Bq, what is the activity of the sample after 20 years?
A. 125 Bq
B. 250 Bq
C. 500 Bq
D. 1000 Bq
Question 12
A light ray passes from air into a glass slab of re\fractive index $n$. If the angle of incidence is $30^\circ$, determine the angle of re\fraction.
A. θ_r = 20^\circ
B. θ_r = 30^\circ
C. θ_r = 40^\circ
D. θ_r = 50^\circ
Question 13
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 0.2 m from its equilibrium position and released from rest. 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 14
A sound wave with a frequency of 200 Hz has a wavelength of 1.5 m. Calculate the speed of the sound wave.
A. 300 m/s
B. 400 m/s
C. 500 m/s
D. 600 m/s
Question 15
A sound wave with a frequency of 200 Hz has a wavelength of 1.5 m. Calculate the speed of the sound wave.
A. 300 m/s
B. 400 m/s
C. 500 m/s
D. 600 m/s

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