POST UTME DELSU 2024 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A light ray passes from air into a glass slab of re\fractive index 1.5. If the angle of incidence is 30°, what is the angle of re\fraction?
A. 20°
B. 25°
C. 30°
D. 35°
Question 2
A spring with a spring cons\tant of 100 N/m is stretched by 2 m. Calculate the potential energy stored in the spring.
A. 100 J
B. 150 J
C. 200 J
D. 250 J
Question 3
A parallel plate capacitor has a capaci\tance of 10 μF and is charged to a potential difference of 12 V. If the dis\tance between the plates is doubled, what is the new capaci\tance?
A. 5 μF
B. 10 μF
C. 20 μF
D. 40 μF
Question 4
A beam of light passes from air into a glass slab of re\fractive index 1.5. If the angle of incidence is 30°, what is the angle of re\fraction?
A. 20°
B. 25°
C. 30°
D. 35°
Question 5
A particle of mass 2 kg is projected from the origin with an initial velocity of 10 m/s at an angle of 60° to the horizontal. Assuming the acceleration due to gravity is 9.8 m/s², calculate the time taken for the particle to reach its maximum height.
A. 1.5 s
B. 2.0 s
C. 2.5 s
D. 3.0 s
Question 6
A heat engine operates between the temperatures 300 K and 600 K. Calculate the efficiency of the engine.
A. 0.3
B. 0.4
C. 0.5
D. 0.6
Question 7
A simple harmonic motion has a maximum displacement of 2 m and a period of 4 s. What is its angular frequency?
A. 0.5 rad/s
B. 1 rad/s
C. 2 rad/s
D. 4 rad/s
Question 8
A photon of energy 2 eV is incident on a metal surface with work function 1.5 eV. What is the maximum kinetic energy of the emitted electron?
A. 0.2 eV
B. 0.5 eV
C. 0.8 eV
D. 1.0 eV
Question 9
A radioactive sample has a half-life of 5 years. If the initial activity is 100 Bq, calculate the activity after 10 years.
A. 25 Bq
B. 50 Bq
C. 75 Bq
D. 100 Bq
Question 10
A magnetic field of strength 0.5 T is applied to a current-carrying wire of length 2 m. If the current is 5 A, what is the magnitude of the force acting on the wire?
A. 3 N
B. 5 N
C. 7 N
D. 9 N
Question 11
A magnetic field of 0.5 T is applied to a coil of 100 turns. If the current is increased from 2 A to 4 A, what is the change in the magnetic flux?
A. 0.1 Wb
B. 0.2 Wb
C. 0.3 Wb
D. 0.4 Wb
Question 12
A capacitor of capaci\tance 10 μF is connected across a 12 V battery. What is the charge stored on the capacitor?
A. 120 μC
B. 1200 μC
C. 12 μC
D. 1.2 μC
Question 13
A heat engine operates between two temperatures of 300 K and 400 K. If it has an efficiency of 30%, what is its Carnot efficiency?
A. 20%
B. 30%
C. 40%
D. 50%
Question 14
A particle of mass 2 kg is moving in a circular path with a radius of 3 m. If the particle's speed is 4 m/s, what is its kinetic energy?
A. 10 J
B. 20 J
C. 30 J
D. 40 J
Question 15
A 50 Hz, 200 V AC supply is connected across a 100 Ω resistor. Calculate the rms value of the current flowing through the resistor.
A. 1 A
B. 2 A
C. 3 A
D. 4 A

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