POST UTME ELIZADE UNIVERSITY 2018 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A particle of mass 1 u and charge +e is moving in a circular path of radius 1 m in a magnetic field of strength 1 T. What is the speed of the particle?
A. 1 m/s
B. 10 m/s
C. 100 m/s
D. 1000 m/s
Question 2
A vector has a magnitude of 5 units and makes an angle of 30° with the positive x-axis. If the vector is rotated by 60° in the counterclockwise direction, what is its new magnitude?
A. 5.12 units
B. 5.66 units
C. 6.08 units
D. 6.50 units
Question 3
A gas is heated from 20°C to 50°C at cons\tant volume. What is the change in internal energy of the gas?
A. -100 J
B. 0 J
C. 100 J
D. 200 J
Question 4
A particle of mass 1 kg is moving in a circular path of radius 1 m with a cons\tant speed of 3 m/s. If the particle is subjected to a centripetal acceleration of 1 m/s^2, what is the magnitude of the force acting on the particle?
A. 3 N
B. 6 N
C. 9 N
D. 12 N
Question 5
A car is traveling at a cons\tant speed of 25 m/s on a circular track with a radius of 50 m. If the car takes 10 s to complete one lap, what is the angular velocity of the car?
A. 0.2 rad/s
B. 0.4 rad/s
C. 0.6 rad/s
D. 0.8 rad/s
Question 6
A sound wave has a frequency of 200 Hz and a wavelength of 0.5 m. What is the speed of the sound wave?
A. 100 m/s
B. 200 m/s
C. 300 m/s
D. 400 m/s
Question 7
A capacitor of capaci\tance 10 μF is charged to a potential difference of 10 V. What is the energy stored in the capacitor?
A. 0.1 J
B. 1 J
C. 10 J
D. 100 J
Question 8
A beam of light is pas\sing through a prism with an angle of re\fraction of 30°. If the angle of incidence is 20°, what is the angle of emergence?
A. 10°
B. 20°
C. 30°
D. 40°
Question 9
A beam of light is incident on a surface at an angle of incidence i. What is the angle of reflection?
A. i
B. \frac{i}{2}
C. 2i
D. \sqrt{i}
Question 10
A wave of frequency 100 Hz and wavelength 10 m is traveling through a medium. What is the speed of the wave?
A. 10 m/s
B. 100 m/s
C. 1000 m/s
D. 10,000 m/s
Question 11
A resistor of resis\tance R is connected in series with an inductor of induc\tance L. What is the impedance of the circuit?
A. R
B. \sqrt{R^2 + \( \omega L \)^2}
C. L
D. \omega L
Question 12
A convex lens of focal length 20 cm is placed in contact with a concave lens of focal length -15 cm. What is the focal length of the combination?
A. -5 cm
B. 10 cm
C. 15 cm
D. 20 cm
Question 13
A thermodynamic system undergoes a process from state A to state B. The initial temperature is 300 K and the final temperature is 400 K. If the change in entropy is 50 J/K, calculate the heat absorbed by the system.
A. 100 J
B. 200 J
C. 300 J
D. 400 J
Question 14
A 240 V, 2 A AC supply is connected to a 100 Ω resistor. Calculate the power consumed by the resistor, given that the current is leading the voltage by 30°.
A. 240 W
B. 480 W
C. 720 W
D. 960 W
Question 15
A block of mass 5 kg is attached to a horizontal spring with a spring cons\tant of 200 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

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