POST UTME AFE BABALOLA UNIVERSITY 2019 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. What is the magnitude of the centripetal acceleration?
A. 4 m/s^2
B. 6 m/s^2
C. \frac{16}{3} m/s^2
D. 8 m/s^2
Question 2
A beam of light passes through a double-slit apparatus and forms an interference pattern on a screen. If the wavelength of the light is 500 nm and the dis\tance between the slits is 0.5 mm, calculate the dis\tance between the central maximum and the first minimum.
A. 1.25 mm
B. 2.5 mm
C. 5 mm
D. 10 mm
Question 3
A projectile is launched at an angle of 30° to the horizontal with an initial velocity of 20 m/s. What is the maximum height reached by the projectile?
A. 8 m
B. 10 m
C. 10.4 m
D. 12 m
Question 4
A projectile is launched at an angle of 60° to the horizontal with an initial velocity of 20 m/s. If the projectile lands 10 m away from the point of launch, what is the initial velocity of the projectile?
A. 10 m/s
B. 15 m/s
C. 20 m/s
D. 25 m/s
Question 5
A particle of mass 2 kg is attached to a spring with a spring cons\tant of 100 N/m. The particle is displaced by 0.5 m from its equilibrium position and released from rest. Assuming the motion is simple harmonic, calculate the angular frequency of the particle's motion.
A. 5 rad/s
B. 10 rad/s
C. 20 rad/s
D. 50 rad/s
Question 6
A body of mass 5 kg is moving with a velocity of 10 m/s. What is its kinetic energy?
A. 125 J
B. 250 J
C. 375 J
D. 500 J
Question 7
A ray of light passes from air into a glass of re\fractive index 1.5. If the angle of incidence is 30°, calculate the angle of re\fraction.
A. 20°
B. 30°
C. 40°
D. 50°
Question 8
A particle of mass 2 kg is moving in a circular path with a radius of 5 m. If the particle has a speed of 10 m/s, what is the centripetal force acting on the particle?
A. 20 N
B. 50 N
C. 100 N
D. 200 N
Question 9
A gas at a pressure of 2 atm and a temperature of 300 K is allowed to expand to a volume of 10 L. If the final temperature is 400 K, what is the final pressure of the gas?
A. 1.2 atm
B. 1.5 atm
C. 2 atm
D. 2.5 atm
Question 10
A circuit consists of a 12 V battery, a 4 Ω resistor, and an inductor of induc\tance 0.1 H. If the current in the circuit is 2 A, calculate the voltage drop across the inductor.
A. 0.2 V
B. 0.4 V
C. 0.6 V
D. 0.8 V
Question 11
A capacitor of capaci\tance 10 μF is connected across a 20 V battery. What is the charge stored in the capacitor?
A. 2 \times 10^{-4} C
B. 4 \times 10^{-4} C
C. 6 \times 10^{-4} C
D. 8 \times 10^{-4} C
Question 12
A heat engine operates between a temperature of 500 K and a temperature of 300 K. If the engine has an efficiency of 30%, what is the temperature of the hot reservoir?
A. 400 K
B. 500 K
C. 600 K
D. 700 K
Question 13
A 5 Ω resistor is connected in series with a 10 Ω resistor and a 15 Ω resistor. If a potential difference of 20 V is applied across the circuit, what is the current flowing through the 5 Ω resistor?
A. 1.33 A
B. 2 A
C. 2.5 A
D. 3 A
Question 14
A circuit consists of a 10 Ω resistor and a 20 Ω resistor connected in series. What is the equivalent resis\tance?
A. 10 Ω
B. 20 Ω
C. 30 Ω
D. 40 Ω
Question 15
A radioactive sample decays with a half-life of 10 years. If the initial activity is 1000 Bq, calculate the activity after 20 years.
A. 125 Bq
B. 250 Bq
C. 500 Bq
D. 1000 Bq

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