POST UTME DELSU 2019 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A block of mass 5 kg is placed on a frictionless surface and attached to a spring with spring cons\tant 50 N/m. If the block is displaced by 0.1 m from its equilibrium position and released from rest, determine the period of oscillation.
A. 2 s
B. 4 s
C. 6 s
D. 8 s
Question 2
A particle of mass 3 kg is attached to a spring with spring cons\tant 150 N/m. If the particle is displaced by 0.3 m from its equilibrium position and released from rest, determine the maximum speed of the particle.
A. 6 m/s
B. 8 m/s
C. 10 m/s
D. 12 m/s
Question 3
A particle of mass 2 kg is attached to a spring with a spring cons\tant of 100 N/m. It is displaced by 0.2 m from its equilibrium position and released from rest. Assuming the motion is simple harmonic, calculate the maximum kinetic energy of the particle.
A. 0.2 J
B. 0.4 J
C. 0.6 J
D. 0.8 J
Question 4
A circuit consists of a 12 V battery, a 4 Ω resistor, and an unknown resistor. The current in the circuit is 2 A. What is the value of the unknown resistor?
A. 2 Ω
B. 6 Ω
C. 8 Ω
D. 10 Ω
Question 5
A 10 μF capacitor is connected in series with a 20 Ω resistor and a 12 V battery. Calculate the time cons\tant of the circuit.
A. 0.2 s
B. 0.4 s
C. 0.6 s
D. 0.8 s
Question 6
A circuit consists of a 12 V battery, a 4 Ω resistor, and an inductor with an induc\tance of 0.5 H. The circuit is closed at time t = 0. Calculate the current in the circuit at time t = 2 s.
A. 2 A
B. 4 A
C. 6 A
D. 8 A
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. What is the magnitude of the centripetal acceleration?
A. 12 m/s^2
B. 16 m/s^2
C. 20 m/s^2
D. 24 m/s^2
Question 8
A radioactive sample decays with a half-life of 5 years. If the initial activity is 1000 Bq, calculate the activity of the sample after 10 years.
A. 500 Bq
B. 750 Bq
C. 1000 Bq
D. 1250 Bq
Question 9
A light ray passes from air into a glass of re\fractive index 1.5. If the angle of incidence is 30°, determine the angle of re\fraction.
A. 20°
B. 30°
C. 40°
D. 50°
Question 10
A light ray passes from a glass of re\fractive index 1.5 into air. If the angle of incidence is 40°, determine the angle of re\fraction.
A. 20°
B. 30°
C. 40°
D. 50°
Question 11
A particle of mass 2 kg is attached to a spring with spring cons\tant 100 N/m. If the particle is displaced by 0.2 m from its equilibrium position and released from rest, determine the maximum speed of the particle.
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s
Question 12
A circuit consists of a 9 V battery, a 6 Ω resistor, and a 3 Ω resistor. What is the current in the circuit?
A. 1 A
B. 2 A
C. 3 A
D. 4 A
Question 13
A point charge of +2 μC is placed at the origin. What is the electric potential at a point 0.5 m away from the charge?
A. 100 V
B. 200 V
C. 300 V
D. 400 V
Question 14
A wave has a frequency of 50 Hz and a wavelength of 0.2 m. What is the speed of the wave?
A. 10 m/s
B. 20 m/s
C. 30 m/s
D. 40 m/s
Question 15
A 50 kg object is moving in a circular path with a radius of 2 m. If the object has a speed of 4 m/s, calculate the centripetal force acting on the object.
A. 20 N
B. 40 N
C. 60 N
D. 80 N

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