POST UTME OSUSTECH 2018 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 100 W bulb is connected to a 220 V power source. What is the current flowing through the bulb?
A. 0.25 A
B. 0.5 A
C. 0.75 A
D. 1 A
Question 2
A wave has a frequency of 100 Hz and a wavelength of 0.1 m. If the wave is traveling in the positive x-direction, what is the direction of the wave?
A. Positive x-direction
B. Negative x-direction
C. Positive y-direction
D. Negative y-direction
Question 3
A capacitor of capaci\tance 10 μF is connected in series with a resistor of resis\tance 100 Ω. If a voltage of 20 V is applied across the circuit, find the current flowing through the circuit.
A. 0.2 A
B. 0.4 A
C. 0.6 A
D. 0.8 A
Question 4
A parallel plate capacitor has a capaci\tance of 10 μF and is charged to a potential difference of 12 V. If a dielectric slab of thickness 2 mm and dielectric cons\tant 4 is inserted between the plates, what is the new capaci\tance?
A. 12.5 μF
B. 15 μF
C. 17.5 μF
D. 20 μF
Question 5
A 50.0 W light bulb is connected to a 120 V power source. What is the current drawn by the bulb?
A. 0.25 A
B. 0.50 A
C. 0.75 A
D. 1.00 A
Question 6
A radioactive subs\tance has a half-life of 5 years. If 100 g of the subs\tance is initially present, find the mass of the subs\tance remaining after 10 years.
A. 25 g
B. 50 g
C. 75 g
D. 100 g
Question 7
A particle of mass 2 kg is moving in a circular path of radius 5 m with a speed of 10 m/s. What is the centripetal force acting on the particle?
A. 100 N
B. 200 N
C. 300 N
D. 400 N
Question 8
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 required to keep the particle in this circular path?
A. 6 N
B. 8 N
C. 10 N
D. 12 N
Question 9
A 5.0 kg object is attached to a horizontal, massless spring with a force cons\tant of 200 N/m. The object is displaced by 0.10 m from its equilibrium position and released from rest. Assuming the object undergoes simple harmonic motion, calculate the period of the motion.
A. 0.50 s
B. 1.00 s
C. 1.50 s
D. 2.00 s
Question 10
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 30° above the horizontal. If the acceleration due to gravity is 9.8 m/s², calculate the maximum height reached by the projectile.
A. 10 m
B. 20 m
C. 30 m
D. 40 m
Question 11
A beam of light is incident on a glass slab at an angle of incidence 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 12
A gas at 300 K expands from 10 L to 50 L against a cons\tant external pressure of 2 atm. What is the work done by the gas?
A. 100 J
B. 200 J
C. 300 J
D. 400 J
Question 13
A 10.0 kg object is moving in a circular path with a radius of 3.0 m. If the object has a speed of 15.0 m/s, what is the centripetal force acting on the object?
A. 50.0 N
B. 75.0 N
C. 100.0 N
D. 125.0 N
Question 14
A gas occupies a volume of 2 L at a pressure of 1 atm. What is the new volume if the pressure is increased to 2 atm?
A. 1 L
B. 2 L
C. 4 L
D. 8 L
Question 15
A 2.5 mH inductor is connected in series with a 40 Ω resistor and a 10 V battery. Assuming the inductor is initially uncharged, what is the current in the circuit after 0.1 s?
A. 0.4 A
B. 0.8 A
C. 1.2 A
D. 1.6 A

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