POST UTME CHRISTOPHER UNIVERSITY 2018 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A sound wave with a frequency of 200 Hz and a wavelength of 0.5 m is traveling through a medium. What is the speed of the sound wave?
A. 100 m/s
B. 200 m/s
C. 400 m/s
D. 800 m/s
Question 2
A light ray passes through a prism of angle 60° and is re\fracted at an angle of 30°. If the angle of incidence is 45°, what is the angle of emergence?
A. 20°
B. 30°
C. 40°
D. 50°
Question 3
A radioactive sample has a half-life of 10 years. If the initial activity of the sample is 100 Bq, what is the activity of the sample after 20 years?
A. 25 Bq
B. 50 Bq
C. 75 Bq
D. 100 Bq
Question 4
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 force exerted on the particle?
A. 10 N
B. 12 N
C. 15 N
D. 20 N
Question 5
A capacitor of capaci\tance 20 μF is connected in parallel to a resistor of resis\tance 100 Ω. If a voltage of 10 V is applied across the circuit, calculate the current flowing through the resistor.
A. 0.1 A
B. 0.2 A
C. 0.5 A
D. 1 A
Question 6
A circuit consists of a 10 Ω resistor, a 20 Ω resistor, and a 5 Ω resistor connected in series. If a voltage of 12 V is applied across the circuit, what is the current in the circuit?
A. 0.5 A
B. 1 A
C. 2 A
D. 3 A
Question 7
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, what is the current flowing through the circuit?
A. 0.2 A
B. 0.4 A
C. 0.6 A
D. 0.8 A
Question 8
A lens of focal length 20 cm forms an image of an object at a dis\tance of 30 cm. What is the magnification of the lens?
A. -0.5
B. -0.6
C. -0.7
D. -0.8
Question 9
A gas is heated from 300 K to 400 K. If the initial volume is 2 L, what is the final volume?
A. 2.5 L
B. 3 L
C. 4 L
D. 5 L
Question 10
A \sinusoidal voltage of 10 V is applied across a circuit. If the frequency of the voltage is 50 Hz, what is the impedance of the circuit?
A. 10 Ω
B. 20 Ω
C. 30 Ω
D. 40 Ω
Question 11
A wave has a frequency of 50 Hz and a wavelength of 10 m. Calculate the speed of the wave.
A. 500 m/s
B. 1000 m/s
C. 1500 m/s
D. 2000 m/s
Question 12
A particle of mass 1 kg is moving in a circular path with a radius of 2 m. If the particle has a speed of 4 m/s, calculate the centripetal force acting on the particle.
A. 20 N
B. 40 N
C. 60 N
D. 80 N
Question 13
A gas is contained in a cylinder of volume 2 L at a pressure of 1 atm. If the temperature of the gas is increased by 10°C, what is the new pressure of the gas?
A. 1.1 atm
B. 1.2 atm
C. 1.5 atm
D. 2 atm
Question 14
A 5 μF capacitor is connected in series with a 10 Ω resistor and a 5 V battery. If the switch is closed at time t = 0, what is the charge on the capacitor at time t = 1 s?
A. 0.05 C
B. 0.1 C
C. 0.15 C
D. 0.2 C
Question 15
A block of mass 2 kg is attached to a horizontal spring with a spring cons\tant of 100 N/m. The block is displaced by 0.2 m from its equilibrium position and then released. What is the maximum speed of the block?
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s

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