POST UTME CALEB UNIVERSITY 2023 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 5 μF capacitor is connected in series with a 10 kΩ resistor. If a 12 V battery is connected across the circuit, what is the time cons\tant of the circuit?
A. 0.2 s
B. 0.5 s
C. 1 s
D. 2 s
Question 2
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 60° above the horizontal. Calculate the maximum height reached by the projectile.
A. 10 m
B. 15 m
C. 20 m
D. 25 m
Question 3
A particle is moving in a circular path with a cons\tant speed of 5 m/s. If the radius of the circle is 2 m, calculate the centripetal acceleration of the particle.
A. 10 m/s^2
B. 20 m/s^2
C. 30 m/s^2
D. 40 m/s^2
Question 4
A 10 Ω resistor is connected in series with a 20 Ω resistor and a 30 Ω resistor. If a 6 V battery is connected across the circuit, what is the current flowing through the 10 Ω resistor?
A. 0.2 A
B. 0.3 A
C. 0.4 A
D. 0.5 A
Question 5
A radioactive sample has a half-life of 10 years. If the initial activity is 100 Bq, what is the activity after 20 years?
A. 10 Bq
B. 20 Bq
C. 30 Bq
D. 40 Bq
Question 6
A 5 Ω resistor is connected in series with a 10 Ω resistor and a 20 V battery. U\sing Kirchhoff's voltage law, calculate the current flowing through the 5 Ω resistor.
A. 2 A
B. 4 A
C. 6 A
D. 8 A
Question 7
A 10 μF capacitor is connected in parallel with a 20 μF capacitor. If a 15 V battery is connected across the circuit, what is the equivalent capaci\tance of the circuit?
A. 10 μF
B. 15 μF
C. 20 μF
D. 30 μF
Question 8
A heat engine operates between two temperatures, 300 K and 400 K. The engine has an efficiency of 30%. Calculate the temperature of the hot reservoir.
A. 350 K
B. 400 K
C. 450 K
D. 500 K
Question 9
A wave with a frequency of 100 Hz and a wavelength of 0.1 m is traveling through a medium. Calculate the speed of the wave.
A. 10 m/s
B. 20 m/s
C. 30 m/s
D. 40 m/s
Question 10
A 100 W heater is connected to a 230 V AC supply. If the power factor is 0.8, what is the current drawn by the heater?
A. 0.5 A
B. 0.6 A
C. 0.7 A
D. 0.8 A
Question 11
A radioactive sample has a half-life of 5 years. If the initial activity is 100 Bq, what is the activity after 10 years?
A. 25 Bq
B. 50 Bq
C. 75 Bq
D. 100 Bq
Question 12
A gas at 300 K expands from 1 L to 2 L against a cons\tant external pressure of 2 atm. Calculate the work done by the gas.
A. -1.2 kJ
B. -1.5 kJ
C. -1.8 kJ
D. -2.0 kJ
Question 13
A capacitor has a capaci\tance of 10 μF and is connected to a 12 V battery. What is the charge stored on the capacitor?
A. 0.12 C
B. 0.12 μC
C. 0.12 mC
D. 0.12 μA
Question 14
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 force of 12 N, what is the magnitude of the acceleration of the particle?
A. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2
Question 15
A body of mass 3 kg is moving in a circular path with a radius of 1 m. The body is experiencing a centripetal acceleration of 20 m/s^2. Calculate the force acting on the body.

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