POST UTME COAL CITY UNIVERSITY 2021 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A gas occupies a volume of 2.5 L at a pressure of 1.5 atm. If the temperature is increased by 10°C, what is the new volume of the gas?
A. 3.1 L
B. 3.5 L
C. 4.0 L
D. 4.5 L
Question 2
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 centripetal acceleration of 2 m/s^2, what is the magnitude of the force acting on the particle?
A. 8 N
B. 10 N
C. 12 N
D. 16 N
Question 3
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. ( 45° )
D. ( 60° )
Question 4
A beam of light of wavelength $5000 \text{ AA}$ passes through a prism of angle $60^circ$. If the re\fractive index of the prism is $1.5$, calculate the angle of deviation.
A. \( delta = 60^circ \)
B. \( delta = 45^circ \)
C. \( delta = 30^circ \)
D. \( delta = 20^circ \)
Question 5
A 10 μF capacitor is connected in series with a 20 Ω resistor and a 100 V battery. If the switch is closed at time t = 0, what is the charge on the capacitor after 5 seconds?
A. 0.2 C
B. 0.4 C
C. 0.6 C
D. 0.8 C
Question 6
A wave has a frequency of 50 Hz and a wavelength of 10 m. What is the speed of the wave?
A. 500 m/s
B. 1000 m/s
C. 1500 m/s
D. 2000 m/s
Question 7
A circuit consists of a 12 V battery, a 4 Ω resistor, and an inductor of 2 H. If the current in the circuit is 2 A, what is the voltage drop across the inductor?
A. 4 V
B. 6 V
C. 8 V
D. 10 V
Question 8
A body of mass 2 kg is moving with a velocity of 5 m/s. If the body is subjected to a force of 10 N, calculate the acceleration of the body.
A. ( 0.5 ) m/s^2
B. ( 1.0 ) m/s^2
C. ( 2.0 ) m/s^2
D. ( 5.0 ) m/s^2
Question 9
A 200 V, 50 Hz AC source is connected to a 100 Ω resistor. Calculate the RMS current flowing through the resistor.
A. 2 A
B. 4 A
C. 6 A
D. 8 A
Question 10
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. Calculate the magnitude of the centripetal force acting on the particle.
A. 10 N
B. 20 N
C. 30 N
D. 40 N
Question 11
A sound wave with a frequency of 200 Hz is emitted from a stationary source. A stationary observer is located 20 m away from the source. If the speed of sound in air is 343 m/s, what is the wavelength of the sound wave?
A. 0.17 m
B. 1.7 m
C. 17 m
D. 170 m
Question 12
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/s^2, what is the maximum height reached by the projectile?
A. 10 m
B. 12 m
C. 15 m
D. 18 m
Question 13
A sound wave with a frequency of 400 Hz is emitted from a stationary source. A stationary observer is located 10 m away from the source. If the speed of sound in air is 343 m/s, what is the wavelength of the sound wave?
A. 0.85 m
B. 8.5 m
C. 85 m
D. 850 m
Question 14
A gas is contained in a cylinder of volume 0.5 m^3 at a pressure of 2 atm. If the temperature of the gas is increased by 50 K, what is the new pressure of the gas?
A. 2.5 atm
B. 3 atm
C. 3.5 atm
D. 4 atm
Question 15
A radioactive sample decays at a rate of 0.05% per hour. If the initial activity of the sample is 1000 Bq, what is the activity of the sample after 5 hours?
A. 900 Bq
B. 950 Bq
C. 990 Bq
D. 1000 Bq

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