POST UTME AFE BABALOLA UNIVERSITY 2017 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 30° above the horizontal. What is the maximum height reached by the projectile?
A. 10 m
B. 15 m
C. 20 m
D. 25 m
Question 2
A radioactive sample decays at a rate of 0.02% per hour. If the initial activity is 1000 Bq, calculate the activity after 5 hours.
A. 900 Bq
B. 950 Bq
C. 980 Bq
D. 990 Bq
Question 3
A block of mass $m$ is attached to a horizontal, massless spring with spring cons\tant $k$. The block is displaced by a dis\tance $x$ from its equilibrium position and released from rest. Assuming the block undergoes simple harmonic motion, what is the angular frequency $\omega$ of the block's motion?
A. \omega = \sqrt{\frac{m}{k}}
B. \omega = \sqrt{\frac{k}{m}}
C. \omega = \frac{k}{m}
D. \omega = \frac{m}{k}
Question 4
A 2 kg block is attached to a horizontal, massless spring with a force 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. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s
Question 5
A parallel plate capacitor consists of two plates, each of area 0.04 m^2, separated by a dis\tance of 0.02 m. The space between the plates is filled with a dielectric material of relative permittivity 4. The capacitor is connected to a battery of emf 12 V. Calculate the capaci\tance of the capacitor.
A. 0.01 F
B. 0.02 F
C. 0.04 F
D. 0.08 F
Question 6
A 2.5 mH inductor is connected in series with a 220 Ω resistor and a 12 V battery. If the inductor is initially at rest, what is the current in the circuit after 5 ms?
A. 0.1 A
B. 0.2 A
C. 0.3 A
D. 0.4 A
Question 7
A sound wave with frequency 200 Hz and amplitude 0.05 m is traveling through a medium with speed 340 m/s. Determine the intensity of the sound wave.
A. 10^-3 W/m^2
B. 10^-2 W/m^2
C. 10^-1 W/m^2
D. 1 W/m^2
Question 8
A particle of mass 2 kg is attached to a spring with spring cons\tant 100 N/m. If the particle is displaced by 0.2 m from its equilibrium position and released from rest, determine the angular frequency of the resulting simple harmonic motion.
A. 10 rad/s
B. 20 rad/s
C. 30 rad/s
D. 40 rad/s
Question 9
A capacitor of capaci\tance 100 μF is connected in series with a 220 Ω resistor and a 12 V battery. If the capacitor is initially uncharged, what is the time cons\tant of the circuit?
A. 0.1 s
B. 0.2 s
C. 0.3 s
D. 0.4 s
Question 10
A parallel plate capacitor has a capaci\tance of 100 μF and a plate separation of 0.01 m. If the dielectric cons\tant of the material between the plates is 2, what is the surface charge density on the plates?
A. 10^\( -6 \) C/m^2
B. 10^\( -5 \) C/m^2
C. 10^\( -4 \) C/m^2
D. 10^\( -3 \) C/m^2
Question 11
A spring with a spring cons\tant of 100 N/m is stretched by 2 m. What is the magnitude of the force exerted by the spring?
A. 100 N
B. 200 N
C. 300 N
D. 400 N
Question 12
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. 10 m/s^2
B. 12 m/s^2
C. 15 m/s^2
D. 20 m/s^2
Question 13
A 10 mH inductor is connected in series with a 5 Ω resistor and a 20 V battery. If the initial current is 0 A, what is the current after 2 seconds?
A. 0.5 A
B. 1 A
C. 2 A
D. 3 A
Question 14
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. What is the magnitude of the force acting on the particle?
A. 10 N
B. 20 N
C. 30 N
D. 40 N
Question 15
A uniform magnetic field of magnitude 2.0 T is directed along the z-axis. A current of 5.0 A flows in a circular loop of radius 0.20 m, placed in the x-y plane. What is the magnitude of the magnetic moment of the loop?
A. 0.10 A\cdot m^2
B. 0.20 A\cdot m^2
C. 0.30 A\cdot m^2
D. 0.40 A\cdot m^2

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