POST UTME IGBINEDION UNIVERSITY 2020 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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 uniform magnetic field of 2 T, what is the magnitude of the magnetic force acting on the particle?
A. 4 N
B. 8 N
C. 12 N
D. 16 N
Question 2
A sound wave has a frequency of 200 Hz and a wavelength of 1.5 m. What is the speed of the wave?
A. 300 m/s
B. 600 m/s
C. 1200 m/s
D. 2400 m/s
Question 3
A point charge of +2 μC is placed at the origin of a coordinate system. What is the electric potential at a point 0.1 m away from the charge?
A. 100 V
B. 200 V
C. 300 V
D. 400 V
Question 4
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 5
A 10 kg block is attached to a horizontal spring with a force cons\tant of 100 N/m. If the block is displaced by 0.2 m from its equilibrium position, what is the magnitude of the force exerted by the spring on the block?
A. 20 N
B. 40 N
C. 60 N
D. 80 N
Question 6
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 7
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 30° to the horizontal. If the projectile lands 10 m away from the launch point, determine the time of flight.
A. 1 s
B. 2 s
C. 3 s
D. 4 s
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. If a potential difference of 5 V is applied across it, calculate the charge stored on the plates.
A. 0.05 C
B. 0.1 C
C. 0.5 C
D. 1 C
Question 10
A gas is enclosed in a container with a movable piston. The gas is heated from 300 K to 400 K. Assuming the volume of the container remains cons\tant, calculate the change in pressure of the gas in pascals.
A. 1000 Pa
B. 2000 Pa
C. 3000 Pa
D. 4000 Pa
Question 11
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 12
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 13
A beam of light is incident on a glass slab at an angle of 60°. If the re\fractive index of glass is 1.5, calculate the angle of re\fraction u\sing Snell's law.
A. 30°
B. 45°
C. 60°
D. 75°
Question 14
A light source is placed 2 m away from a convex lens of focal length 0.5 m. What is the image dis\tance?
A. ( 1.0 ) m
B. ( 1.5 ) m
C. ( 2.0 ) m
D. ( 2.5 ) m
Question 15
A thermodynamic system undergoes a process from state A to state B, where the internal energy change is ΔU = 200 J. If the heat added to the system is Q = 300 J, determine the work done by the system.
A. -100 J
B. 100 J
C. 200 J
D. 300 J

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