POST UTME JOSEPH AYO BABALOLA UNIVERSITY 2024 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 10 Ω resistor is connected in parallel with a 20 Ω resistor. If a 100 V source is connected across the combination, calculate the current flowing through the 10 Ω resistor.
A. 5 A
B. 10 A
C. 15 A
D. 20 A
Question 2
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 3
A 50 Hz AC source is connected in series with a 20 Ω resistor and a 10 μF capacitor. If the voltage across the capacitor is 100 V, calculate the current flowing through the circuit.
A. 2 A
B. 4 A
C. 6 A
D. 8 A
Question 4
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 5
A simple p\endulum of length 1.5 m is released from an initial angle of 30°. What is the time period of the p\endulum?
A. 2 s
B. 3 s
C. 4 s
D. 5 s
Question 6
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 7
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 force and the radius vector at the ins\tant the particle is at the top of its path?
A. 45°
B. 60°
C. 90°
D. 120°
Question 8
A body is moving in a circular path with a radius of 0.5 m. If the body completes one revolution in 2 seconds, what is its angular velocity?
A. 1 rad/s
B. 2 rad/s
C. 3 rad/s
D. 4 rad/s
Question 9
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
Question 10
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 11
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 12
A block of mass 5 kg is placed on a frictionless surface and attached to a horizontal spring with a spring cons\tant of 100 N/m. If the block is displaced by 2 m from its equilibrium position and released, what is the maximum speed of the block?
A. 10 m/s
B. 15 m/s
C. 20 m/s
D. 25 m/s
Question 13
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 14
A body of mass 2 kg is moving with a velocity of 5 m/s. What is its kinetic energy?
A. 25 J
B. 50 J
C. 75 J
D. 100 J
Question 15
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 force and the radius vector?
A. 30°
B. 45°
C. 60°
D. 90°

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