POST UTME GREENFIELD UNIVERSITY 2023 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A circuit consists of a 12 Ω resistor, a 20 Ω resistor, and a 30 Ω resistor connected in series. If a voltage of 24 V is applied across the circuit, calculate the current flowing through the 30 Ω resistor.
A. 0.5 A
B. 0.6 A
C. 0.7 A
D. 0.8 A
Question 2
A wave has a frequency of 50 Hz and a wavelength of 0.2 m. What is the speed of the wave?
A. 10 m/s
B. 20 m/s
C. 30 m/s
D. 40 m/s
Question 3
A particle of mass 5 kg is moving in a straight line with a velocity of 10 m/s. If the particle is subjected to a force of 20 N, what is 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 4
A gas is heated from 300 K to 400 K at cons\tant volume. If the initial volume is 2 L, what is the final volume?
A. 2.5 L
B. 3 L
C. 3.5 L
D. 4 L
Question 5
A particle is projected at an angle of 60° to the horizontal with an initial velocity of 20 m/s. If the acceleration due to gravity is 9.8 m/s², what is the time taken for the particle to reach its maximum height?
A. 0.5 s
B. 1.0 s
C. 1.5 s
D. 2.0 s
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 force acting on the particle?
A. 8 N
B. 12 N
C. 16 N
D. 20 N
Question 7
A meter stick is placed on a horizontal surface with one \end against a wall. If the meter stick is 1 m long and the wall is 0.8 m away from the other \end of the stick, what is the dis\tance between the wall and the other \end of the stick?
A. 0.2 m
B. 0.3 m
C. 0.4 m
D. 0.5 m
Question 8
A sound wave of frequency 200 Hz is traveling through a medium with a speed of 340 m/s. If the wavelength of the wave is 1.7 m, what is the amplitude of the wave?
A. 0.05 m
B. 0.1 m
C. 0.15 m
D. 0.2 m
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. If the particle is subjected to a centripetal force of 12 N, what is the magnitude of the acceleration of the particle?
A. 8 m/s^2
B. 12 m/s^2
C. 16 m/s^2
D. 20 m/s^2
Question 10
A simple harmonic motion has a maximum displacement of 5 cm and a time period of 2 s. If the particle is at a displacement of 2 cm at t = 1 s, what is the velocity of the particle at that ins\tant?
A. 1 m/s
B. 2 m/s
C. 3 m/s
D. 4 m/s
Question 11
A 100 V AC source is connected to a 20 Ω resistor. If the frequency of the AC source is 50 Hz, what is the rms value of the current?
A. 2.0 A
B. 4.0 A
C. 5.0 A
D. 10 A
Question 12
A parallel plate capacitor consists of two plates, each of area 0.01 m^2, separated by a dis\tance of 0.001 m. If the capaci\tance is 10 nF, calculate the charge stored when the potential difference between the plates is 5 V.
A. 50 nC
B. 100 nC
C. 200 nC
D. 500 nC
Question 13
A wave has a wavelength of 10 m and a frequency of 5 Hz. If the wave is traveling in the positive x-direction, calculate the velocity of the wave.
A. 20 m/s
B. 30 m/s
C. 40 m/s
D. 50 m/s
Question 14
A magnetic field of 0.5 T is applied to a current-carrying wire of length 1 m. If the current is 2 A, what is the force experienced by the wire?
A. 0.5 N
B. 1 N
C. 1.5 N
D. 2 N
Question 15
A gas is compressed from an initial volume of 2 m^3 to a final volume of 1 m^3. If the initial pressure is 100 kPa and the final pressure is 200 kPa, what is the work done on the gas?
A. 100 J
B. 200 J
C. 300 J
D. 400 J

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