POST UTME JOSEPH AYO BABALOLA UNIVERSITY 2024 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A particle of mass 3 kg is moving in a circular path of radius 2 m with a cons\tant speed of 6 m/s. If the particle is subjected to a centripetal force of 18 N, what is the magnitude of the force?
A. 12 N
B. 18 N
C. 24 N
D. 36 N
Question 2
A heat engine operates between two reservoirs at temperatures of 500 K and 300 K. If the engine has an efficiency of 30%, what is the temperature of the hot reservoir?
A. 600 K
B. 700 K
C. 800 K
D. 900 K
Question 3
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 angle between the velocity vector and the radius vector at the ins\tant when the particle is at the top of its circular path?
A. π/2
B. π/3
C. π/4
D. π/6
Question 4
A heat engine operates between two reservoirs at temperatures of 600 K and 400 K. If the engine has an efficiency of 40%, what is the temperature of the hot reservoir?
A. 800 K
B. 900 K
C. 1000 K
D. 1100 K
Question 5
A capacitor consists of two parallel plates, each of area 0.1 m², separated by a dis\tance of 0.01 m. If the capaci\tance is 10 μF, what is the charge stored on the capacitor when a potential difference of 5 V is applied across it?
A. 0.05 C
B. 0.1 C
C. 0.15 C
D. 0.2 C
Question 6
A circuit consists of a 10 ohm resistor and a 20 ohm resistor connected in series. If a voltage of 100 V is applied across the circuit, what is the current flowing through the circuit?
A. 2 A
B. 4 A
C. 6 A
D. 8 A
Question 7
A current of 5 A flows through a resistor of 10 Ω. What is the power dissipated by the resistor?
A. 25 W
B. 50 W
C. 75 W
D. 100 W
Question 8
A sound wave with a frequency of 400 Hz and a wavelength of 2 m is traveling through a medium with a speed of 340 m/s. What is the amplitude of the wave?
A. 0.01 m
B. 0.02 m
C. 0.03 m
D. 0.04 m
Question 9
A sound wave with a frequency of 200 Hz and a wavelength of 1.5 m is traveling through a medium with a speed of 340 m/s. What is the amplitude of the wave?
A. 0.01 m
B. 0.02 m
C. 0.03 m
D. 0.04 m
Question 10
A 100 μA current flows through a 10 Ω resistor. If the voltage across the resistor is 10 V, calculate the power dissipated by the resistor.
A. 10 mW
B. 100 mW
C. 1 W
D. 10 W
Question 11
A current of 5 A flows through a resistor of 10 Ω. What is the voltage drop across the resistor?
A. 50 V
B. 75 V
C. 100 V
D. 125 V
Question 12
A capacitor consists of two parallel plates, each of area 0.1 m², separated by a dis\tance of 0.01 m. If the capaci\tance is 10 μF, what is the energy stored in the capacitor when a potential difference of 5 V is applied across it?
A. 0.025 J
B. 0.05 J
C. 0.075 J
D. 0.1 J
Question 13
A radioactive sample has a half-life of 2 hours. If the initial activity of the sample is 100 Bq, what is the activity of the sample after 4 hours?
A. 25 Bq
B. 50 Bq
C. 75 Bq
D. 100 Bq
Question 14
A point charge of 5 μC is placed at the origin of a coordinate system. If a second point charge of -3 μC is placed at a dis\tance of 2 m from the origin, what is the electric potential at the point (1, 1) due to the two charges?
A. 100 V
B. 200 V
C. 300 V
D. 400 V
Question 15
A convex lens of focal length 20 cm is placed in contact with a concave lens of focal length -15 cm. What is the focal length of the combination?
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm

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