POST UTME KSU 2024 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A gas is heated from 300 K to 400 K at cons\tant volume. If the initial volume is 2.5 L and the gas cons\tant is 0.082 L atm/mol K, what is the final pressure of the gas in atm?
A. 1.5 atm
B. 2.5 atm
C. 3.0 atm
D. 4.0 atm
Question 2
A sound wave with a frequency of 200 Hz and an amplitude of 0.5 m is traveling through a medium with a speed of 343 m/s. What is the wavelength of the sound wave?
A. 1.71 m
B. 2.14 m
C. 2.57 m
D. 3.00 m
Question 3
A parallel plate capacitor has a capaci\tance of 10 μF and is charged to a potential difference of 12 V. If the dis\tance between the plates is doubled, what is the new potential difference?
A. 6 V
B. 8 V
C. 10 V
D. 12 V
Question 4
A current of 5 A flows through a resistor of 10 Ω. If the power consumed is 25 W, what is the voltage across the resistor?
A. 5 V
B. 10 V
C. 15 V
D. 20 V
Question 5
A particle of mass $m$ is moving in a simple harmonic motion with angular frequency $\omega$. If the particle's displacement from the equilibrium position is $x$, what is its kinetic energy $K$?
A. \frac{1}{2}m\omega^2x^2
B. \frac{1}{2}m\omega^2
C. \frac{1}{2}m\omega^2x
D. \frac{1}{2}m\omega^2x^3
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. If the particle is subjected to a centripetal force of 12 N, what is the magnitude of the force?
A. 8 N
B. 12 N
C. 16 N
D. 20 N
Question 7
A light wave has a frequency $f$ and a wavelength $\lambda$. If the wave is traveling through a medium with re\fractive index $n$, what is its speed $v$?
A. \frac{c}{n}
B. \frac{c}{\lambda}
C. \frac{f}{n}
D. \frac{f\lambda}{n}
Question 8
A block of mass 2 kg is attached to a 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 from rest, what is the maximum speed of the block?
A. 1.4 m/s
B. 1.6 m/s
C. 1.8 m/s
D. 2.0 m/s
Question 9
A capacitor of capaci\tance 10 μF is connected to a 12 V battery. What is the charge stored on the capacitor?
A. 0.12 C
B. 0.24 C
C. 0.36 C
D. 0.48 C
Question 10
A parallel plate capacitor has a capaci\tance of 2 μF and is charged to a potential difference of 10 V. If a dielectric slab of thickness 0.5 mm and relative permittivity 4 is inserted between the plates, what is the new capaci\tance?
A. 4 μF
B. 8 μF
C. 12 μF
D. 16 μF
Question 11
A sound wave has a frequency of 200 Hz and a wavelength of 0.5 m. If the speed of sound is 340 m/s, what is the amplitude of the wave?
A. 0.1 m
B. 0.2 m
C. 0.3 m
D. 0.4 m
Question 12
A 100 W light bulb is connected to a 220 V power source. If the bulb is 5% efficient, what is the current drawn from the power source?
A. 0.45 A
B. 0.50 A
C. 0.55 A
D. 0.60 A
Question 13
A particle of mass 1 kg is confined to a one-dimensional box of length 1 m. What is the ground-state energy of the particle?
A. 6.025 \times 10^{-34} J
B. 1.21 \times 10^{-34} J
C. 2.42 \times 10^{-34} J
D. 4.83 \times 10^{-34} J
Question 14
A light ray passes through a prism with an angle of incidence of 30° and an angle of re\fraction of 20°. If the angle of the prism is 60°, what is the angle of deviation?
A. 10°
B. 20°
C. 30°
D. 40°
Question 15
A magnetic field has a strength of 0.5 T and a direction that is perp\endicular to the plane of the page. If a current of 2 A is flowing in a wire that is parallel to the magnetic field, what is the magnitude of the force on the wire?
A. 0.5 N
B. 1.0 N
C. 1.5 N
D. 2.0 N

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