POST UTME IGBINEDION UNIVERSITY 2020 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A light ray is incident on a glass slab at an angle of 60°. If the re\fractive index of the glass is 1.5, what is the angle of re\fraction?
A. 30°
B. 40°
C. 50°
D. 60°
Question 2
A thermodynamic system undergoes a process from an initial state of 100 kPa and 300 K to a final state of 200 kPa and 400 K. What is the change in entropy of the system?
A. 0.5 kJ/K
B. 1 kJ/K
C. 2 kJ/K
D. 5 kJ/K
Question 3
A body of mass 5 kg is moving with a velocity of 10 m/s. What is its kinetic energy?
A. ( 250 ) J
B. ( 500 ) J
C. ( 750 ) J
D. ( 1000 ) J
Question 4
A force of 20 N is applied to a spring, cau\sing it to stretch by 5 cm. If the spring cons\tant is 100 N/m, calculate the work done in stretching the spring.
A. 1 J
B. 2 J
C. 5 J
D. 10 J
Question 5
A gas is contained in a cylinder of volume 0.05 m^3 at a pressure of 2 atm. If the temperature is increased by 10°C, what is the new pressure of the gas?
A. 2.5 atm
B. 3 atm
C. 3.5 atm
D. 4 atm
Question 6
A wave has a frequency of 100 Hz and a wavelength of 2 m. If it is traveling in a medium with a speed of 300 m/s, calculate the wave number.
A. 100 rad/m
B. 150 rad/m
C. 200 rad/m
D. 250 rad/m
Question 7
A magnetic field is produced by a current-carrying wire. If the current is 2 A and the length of the wire is 0.5 m, determine the magnetic field strength at a dis\tance of 0.2 m from the wire.
A. 0.1 T
B. 0.2 T
C. 0.3 T
D. 0.4 T
Question 8
A 2.5 m long wire is made of a material with a resistivity of 1.8 × 10^\( -8 \) Ωm. What is the resis\tance of the wire?
A. 0.45 Ω
B. 0.9 Ω
C. 1.8 Ω
D. 4.5 Ω
Question 9
A parallel plate capacitor has a capaci\tance of 10 μF and is charged to a potential difference of 5 V. What is the energy stored in the capacitor?
A. 25 μJ
B. 50 μJ
C. 100 μJ
D. 200 μJ
Question 10
A wave has a frequency of 50 Hz and a wavelength of 0.2 m. What is its speed?
A. ( 10 ) m/s
B. ( 20 ) m/s
C. ( 30 ) m/s
D. ( 40 ) m/s
Question 11
A parallel plate capacitor has a capaci\tance of 2 μF. If a potential difference of 10 V is applied across the plates, calculate the charge stored on each plate in coulombs.
A. 20 C
B. 40 C
C. 60 C
D. 80 C
Question 12
A sound wave has a frequency of 200 Hz and a wavelength of 0.5 m. Calculate the speed of the sound wave in meters per second.
A. 100 m/s
B. 200 m/s
C. 300 m/s
D. 400 m/s
Question 13
A 5 kg object is moving in a circular path with a radius of 2 m. If the object has a speed of 4 m/s, what is the magnitude of the centripetal force acting on the object?
A. 10 N
B. 20 N
C. 30 N
D. 40 N
Question 14
A point charge of 2 μC is placed at the origin of a coordinate system. A second point charge of -3 μC is placed at the point (0.5 m, 0). What is the magnitude of the electric field at the point (0.25 m, 0)?
A. \( 2.5 \times 10^5 \) N/C
B. \( 1.25 \times 10^5 \) N/C
C. \( 5.0 \times 10^4 \) N/C
D. \( 1.0 \times 10^4 \) N/C
Question 15
A particle of mass 0.5 kg is moving in a circular path with a radius of 2 m. If the particle has a speed of 4 m/s, determine the centripetal acceleration.
A. 2 m/s²
B. 4 m/s²
C. 6 m/s²
D. 8 m/s²

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