POST UTME BOWEN UNIVERSITY 2018 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A \tank is filled with water to a height of $h$. A small hole of area $A$ is made at the bottom of the \tank. Assuming the water flows out of the hole with a speed $v$, what is the rate at which the water level in the \tank falls?
A. \frac{A}{h}v
B. \frac{Ah}{v}
C. \frac{v}{Ah}
D. \frac{Ah}{v^2}
Question 2
A parallel plate capacitor has plates of area 0.04 m^2 and separation 0.02 m. If a potential difference of 10 V is applied across the plates, calculate the capaci\tance.
A. 2.5 x 10^-10 F
B. 5.0 x 10^-10 F
C. 1.0 x 10^-9 F
D. 2.0 x 10^-9 F
Question 3
A body of mass 5 kg is moving with a velocity of 10 m/s. What is its kinetic energy?
A. 100 J
B. 200 J
C. 250 J
D. 300 J
Question 4
A sound wave has a frequency of 200 Hz and a wavelength of 0.5 m. Calculate the speed of the sound wave.
A. 100 m/s
B. 200 m/s
C. 300 m/s
D. 400 m/s
Question 5
A projectile is launched at an angle of 60° above the horizontal with an initial velocity of 20 m/s. What is the maximum height reached by the projectile?
A. 10 m
B. 15 m
C. 20 m
D. 25 m
Question 6
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 acceleration of 2 m/s^2, calculate the force exerted on the particle.
A. 2 N
B. 4 N
C. 6 N
D. 8 N
Question 7
A light source emits a beam of light with a wavelength of 500 nm. If the beam passes through a dif\fraction grating with 1000 lines/mm, what is the angle of dif\fraction?
A. 10°
B. 20°
C. 30°
D. 40°
Question 8
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 60 degrees above the horizontal. If the projectile lands 10 m away from the point of launch, calculate the time of flight.
A. 2 s
B. 3 s
C. 4 s
D. 5 s
Question 9
A parallel plate capacitor has plates of area $A$ and separation $d$. If the capaci\tance is $C$, what is the value of the dielectric cons\tant $kappa$?
A. \frac{Cd}{\epsilon_0A}
B. \frac{\epsilon_0A}{Cd}
C. \frac{Cd}{\epsilon_0}
D. \frac{\epsilon_0}{Cd}
Question 10
A ray of light passes through a prism with an angle of incidence $\theta_i$ and an angle of re\fraction $\theta_r$. If the angle of deviation $\delta$ is measured, what is the value of the re\fractive index $n$?
A. \frac{\sin\theta_i}{\sin\theta_r}
B. \frac{\sin\theta_r}{\sin\theta_i}
C. \frac{\sin\delta}{\sin\theta_i}
D. \frac{\sin\delta}{\sin\theta_r}
Question 11
A parallel plate capacitor has a capaci\tance of 10 μF. If a potential difference of 20 V is applied across the plates, what is the charge stored on the capacitor?
A. 0.2 C
B. 0.4 C
C. 0.8 C
D. 1.6 C
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. What is the magnitude of the centripetal acceleration of the particle?
A. 10 m/s^2
B. 16 m/s^2
C. 20 m/s^2
D. 24 m/s^2
Question 13
A 100 Ω resistor is connected in parallel with a 200 Ω resistor. What is the equivalent resis\tance of the circuit?
A. 50 Ω
B. 75 Ω
C. 100 Ω
D. 150 Ω
Question 14
A particle of mass 3 kg is moving in a circular path of radius 2 m with a cons\tant speed of 8 m/s. What is the magnitude of the centripetal acceleration of the particle?
A. 20 m/s^2
B. 32 m/s^2
C. 40 m/s^2
D. 50 m/s^2
Question 15
A wave has a frequency of 50 Hz and a wavelength of 0.2 m. What is the speed of the wave?
A. 5 m/s
B. 10 m/s
C. 15 m/s
D. 20 m/s

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