POST UTME BOWEN UNIVERSITY 2018 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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 2
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 3
A heat engine operates between a temperature of 500 K and a temperature of 300 K. Calculate the efficiency of the engine.
A. 0.25
B. 0.33
C. 0.40
D. 0.50
Question 4
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 5
A quantum particle has a wave function given by ψ(x) = Ae^\( -αx^2 \). If the average value of x is 0.5 m, what is the value of α?
A. 0.01 m^\( -2 \)
B. 0.1 m^\( -2 \)
C. 1 m^\( -2 \)
D. 10 m^\( -2 \)
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. 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 7
A parallel plate capacitor consists of two plates, each of area 0.1 m^2, separated by a dis\tance of 0.01 m. If the capaci\tance of the capacitor is 10^-6 F, calculate the charge stored on the capacitor when a potential difference of 10 V is applied across it.
A. 10^-8 C
B. 10^-7 C
C. 10^-6 C
D. 10^-5 C
Question 8
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
Question 9
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. 16 m/s^2
B. 32 m/s^2
C. 48 m/s^2
D. 64 m/s^2
Question 10
A block of mass $M$ is placed on a frictionless surface and a force $F$ is applied to it. The block accelerates with a cons\tant acceleration $a$. What is the magnitude of the force $F$?
A. Ma
B. \frac{Ma}{2}
C. \frac{2Ma}{3}
D. \frac{3Ma}{4}
Question 11
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 12
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 13
A block of mass 2 kg is attached to a horizontal, massless spring with a spring cons\tant of 100 N/m. The block is displaced by 0.2 m from its equilibrium position and released from rest. Assuming the block undergoes simple harmonic motion, calculate the maximum speed of the block as it passes through the equilibrium position.
A. 4 m/s
B. 6 m/s
C. 8 m/s
D. 10 m/s
Question 14
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 15
A gas is heated from 0°C to 100°C at cons\tant volume. Find the change in internal energy ΔU in terms of the specific heat capacity c.
A. \Delta U = mc\frac{\Delta T}{2}
B. \Delta U = mc\Delta T
C. \Delta U = mc\frac{\Delta T}{3}
D. \Delta U = mc\frac{\Delta T}{4}

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