POST UTME OSUSTECH 2018 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A circuit consists of a 15 V battery, a 2 Ω resistor, and a 3 Ω resistor connected in parallel. If the circuit is closed, what is the current flowing through the 2 Ω resistor?
A. 2 A
B. 3 A
C. 4 A
D. 5 A
Question 2
A 10.0 kg object is moving in a circular path with a radius of 5.0 m. If the object has a speed of 20.0 m/s, what is the centripetal acceleration of the object?
A. 10.0 m/s^2
B. 20.0 m/s^2
C. 30.0 m/s^2
D. 40.0 m/s^2
Question 3
A circuit consists of a 10 Ω resistor and a 20 Ω resistor connected in series. What is the equivalent resis\tance of the circuit?
A. 10 Ω
B. 15 Ω
C. 20 Ω
D. 30 Ω
Question 4
A block of mass 3 kg is placed on a frictionless surface and attached to a horizontal spring with a force cons\tant of 100 N/m. If the block is displaced by 0.05 m from its equilibrium position and released from rest, what is the maximum speed of the block?
A. 1 m/s
B. 2 m/s
C. 3 m/s
D. 4 m/s
Question 5
A 20.0 W light bulb is connected to a 240 V power source. What is the current drawn by the bulb?
A. 0.50 A
B. 0.75 A
C. 1.00 A
D. 1.25 A
Question 6
A nucleus of mass number 30 and atomic number 15 undergoes \alpha decay. What is the resulting nucleus?
A. ^30P
B. ^30S
C. ^30Cl
D. ^30Ar
Question 7
A light wave with a frequency of 5.0 x 10^14 Hz is incident on a surface with a re\fractive index of 1.5. What is the wavelength of the light in the medium?
A. 200 nm
B. 250 nm
C. 300 nm
D. 350 nm
Question 8
A 2.0 kg block is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. The block is displaced by 0.20 m from its equilibrium position and released from rest. Assuming the block undergoes simple harmonic motion, calculate the maximum kinetic energy of the block.
A. 0.50 J
B. 1.00 J
C. 1.25 J
D. 1.50 J
Question 9
A light ray passes from air into a glass slab of thickness 4.0 cm and re\fractive index 1.5. If the angle of incidence is 30°, what is the angle of re\fraction?
A. 20°
B. 25°
C. 30°
D. 35°
Question 10
A 100 W light bulb is connected to a 220 V power source. What is the current in the circuit?
A. 0.4 A
B. 0.8 A
C. 1.2 A
D. 1.6 A
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 sound wave with a frequency of 200 Hz is emitted from a source moving towards a stationary observer. If the speed of sound in air is 343 m/s, what is the apparent frequency heard by the observer?
A. 220 Hz
B. 240 Hz
C. 260 Hz
D. 280 Hz
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 particle of mass 2 kg is projected from the origin with an initial velocity of 20 m/s at an angle of 60° to the horizontal. Find the time of flight.
A. 2.5 s
B. 3.0 s
C. 3.5 s
D. 4.0 s
Question 15
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

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