POST UTME CHRISTOPHER UNIVERSITY 2021 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 with a cons\tant speed of 4 m/s. If the radius of the path is 3 m, calculate the magnitude of the force acting on the particle.
A. 12 N
B. 16 N
C. 20 N
D. 24 N
Question 2
A light ray passes through a prism with an angle of incidence of 30° and an angle of re\fraction of 20°. Calculate the angle of deviation.
A. 10°
B. 15°
C. 20°
D. 25°
Question 3
A 10 μF capacitor is connected in series with a 20 Ω resistor. If a 12 V battery is connected across the circuit, calculate the current flowing through the circuit.
A. 0.25 A
B. 0.5 A
C. 0.75 A
D. 1 A
Question 4
A nucleus of mass number 238 and atomic number 92 undergoes \alpha decay. What is the mass number and atomic number of the daughter nucleus?
A. 234,90
B. 236,91
C. 238,92
D. 240,93
Question 5
A wave has a frequency of 100 Hz and a wavelength of 5 m. Calculate the speed of the wave.
A. 500 m/s
B. 1000 m/s
C. 1500 m/s
D. 2000 m/s
Question 6
A light ray passes through a lens with a focal length of 0.5 m. If the object dis\tance is 1 m, calculate the image dis\tance.
A. 2 m
B. 3 m
C. 4 m
D. 5 m
Question 7
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 8
A circuit consists of a 10 Ω resistor and a 20 Ω resistor connected in series. If a voltage of 50 V is applied across the circuit, what is the current flowing through the circuit?
A. 0.5 A
B. 1 A
C. 2 A
D. 5 A
Question 9
A 50 Hz AC generator has an emf of 100 V. If the current is 5 A, what is the impedance of the circuit?
A. 10 Ω
B. 20 Ω
C. 50 Ω
D. 100 Ω
Question 10
A wave has a frequency of 200 Hz and a wavelength of 0.5 m. What is the speed of the wave?
A. 100 m/s
B. 200 m/s
C. 300 m/s
D. 400 m/s
Question 11
A particle is projected from the origin with an initial velocity of 20 m/s at an angle of 60° to the horizontal. What is the time of flight?
A. 1 s
B. 2 s
C. 3 s
D. 4 s
Question 12
A 200 V AC supply is connected to a 50 Ω resistor. If the current drawn from the supply is 4 A, what is the power consumed by the resistor?
A. 800 W
B. 1000 W
C. 1200 W
D. 1400 W
Question 13
A 100 Ω resistor is connected in series with a 20 μF capacitor across a 10 V AC source. If the frequency of the source is 50 Hz, what is the impedance of the circuit?
A. 150 Ω
B. 200 Ω
C. 250 Ω
D. 300 Ω
Question 14
A 10 μF capacitor is connected in parallel with a 20 Ω resistor. If a 12 V battery is connected across the circuit, calculate the current flowing through the resistor.
A. 0.6 A
B. 0.8 A
C. 1 A
D. 1.2 A
Question 15
A gas at $25^{circ}C$ and $1.0 \times 10^5 Pa$ is heated to $50^{circ}C$ while maintaining cons\tant pressure. Calculate the new volume of the gas, given that the initial volume is $2.5 , \text{m}^3$.
A. 3.125 m^3
B. 4.1667 m^3
C. 5.0 m^3
D. 6.25 m^3

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