POST UTME NILE UNIVERSITY 2024 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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 acceleration of the particle?
A. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2
Question 2
A body of mass 5 kg is moving with a velocity of 10 m/s. If the body is subjected to a force of 20 N, what is the change in its kinetic energy?
A. 100 J
B. 200 J
C. 300 J
D. 400 J
Question 3
A particle of mass 3 kg is moving in a circular path of radius 4 m with a cons\tant speed of 3 m/s. If the particle is subjected to a centripetal force of 15 N, what is the magnitude of the acceleration of the particle?
A. 10 m/s^2
B. 12 m/s^2
C. 15 m/s^2
D. 20 m/s^2
Question 4
A body of mass 5 kg is moving with a velocity of 2 m/s. If it is subjected to a force of 10 N, what is the acceleration of the body?
A. 0.5 m/s^2
B. 1 m/s^2
C. 2 m/s^2
D. 5 m/s^2
Question 5
A beam of light passes through a convex lens of focal length $f$. If the object dis\tance is $u$, what is the image dis\tance $v$?
A. 1/v = 1/f - 1/u
B. 1/v = 1/f + 1/u
C. 1/v = 1/f - u
D. 1/v = 1/f + u
Question 6
A wave with a frequency of 50 Hz and a wavelength of 2 m is traveling through a medium. If the speed of the wave is 100 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 7
A particle of mass 0.5 kg is moving in a circular path of radius 2 m with a cons\tant speed of 4 m/s. If the particle is subjected to a centripetal force of 10 N, calculate the time taken for the particle to complete one revolution.
A. 1.6 s
B. 2.1 s
C. 2.5 s
D. 3.2 s
Question 8
A particle of mass $m$ is attached to a spring with spring cons\tant $k$. The particle is displaced from its equilibrium position by a dis\tance $x_0$ and released from rest. Assuming the motion is simple harmonic, find the angular frequency $omega$ of the particle's motion.
A. ω = 0
B. ω = √\( k/m \)
C. ω = k/m
D. ω = √\( m/k \)
Question 9
A 100 Ω resistor is connected in series with a 20 μF capacitor and a 10 μH inductor. If the circuit is driven by a 50 Hz AC source with a peak voltage of 10 V, calculate the impedance of the circuit.
A. 150 Ω
B. 200 Ω
C. 250 Ω
D. 300 Ω
Question 10
A parallel plate capacitor has a capaci\tance of 5 μF. If a potential difference of 10 V is applied across the plates, what is the charge stored on the capacitor?
A. 0.05 C
B. 0.1 C
C. 0.5 C
D. 1 C
Question 11
A sound wave with frequency $f$ is produced by a source moving at a speed $v_s$. If the speed of sound in the medium is $v$, what is the Doppler shift $Δf$?
A. Δf = f - v_s/v
B. Δf = f + v_s/v
C. Δf = v_s/vf
D. Δf = fv_s/v
Question 12
A spring has a spring cons\tant of 100 N/m. If it is stretched by 2 m, what is the potential energy stored in the spring?
A. 200 J
B. 400 J
C. 600 J
D. 800 J
Question 13
A particle of mass 2 kg is attached to a spring with a spring cons\tant of 100 N/m. The particle is displaced by 0.2 m from its equilibrium position and released from rest. Assuming the motion is simple harmonic, calculate the maximum speed of the particle.
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s
Question 14
A wave has a frequency of 60 Hz and a speed of 300 m/s. Calculate the wavelength of the wave.
A. 1 m
B. 2 m
C. 3 m
D. 4 m
Question 15
A 2 kg block of ice at 0°C is placed in a 10°C water bath. Assuming the specific heat capacity of ice is 2090 J/(kg°C) and the latent heat of fusion of ice is 334 kJ/kg, calculate the energy required to melt the ice completely.
A. 2.1 kJ
B. 3.4 kJ
C. 4.2 kJ
D. 5.5 kJ

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