POST UTME VERITAS UNIVERSITY 2023 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A radioactive sample has a half-life of 5 years. If the initial activity of the sample is 100 Bq, what is the activity of the sample after 10 years?
A. 50 Bq
B. 25 Bq
C. 12.5 Bq
D. 6.25 Bq
Question 2
A 100 W light bulb is connected to a 220 V power source. Find the current in the bulb.
A. 0.5 A
B. 1 A
C. 2 A
D. 5 A
Question 3
A particle of mass 1 kg is moving in a straight line with an initial velocity of 5 m/s. If a force of 2 N is applied to the particle, determine its acceleration after 2 seconds.
A. 1 m/s^2
B. 2 m/s^2
C. 3 m/s^2
D. 4 m/s^2
Question 4
A light ray passes through a prism and is re\fracted. If the angle of incidence is $i$ and the angle of re\fraction is $r$, calculate the angle of deviation $D$.
A. D=i-r
B. D=i+r
C. D=r-i
D. D=r+i
Question 5
A block of mass 2 kg is placed on a horizontal, frictionless surface. A horizontal force of 10 N is applied to the block. Find the acceleration of the block.
A. 2 m/s^2
B. 5 m/s^2
C. 10 m/s^2
D. 20 m/s^2
Question 6
A beam of light passes from air into a glass slab of re\fractive index 1.5. If the angle of incidence is 30°, calculate the angle of re\fraction.
A. 20°
B. 30°
C. 40°
D. 50°
Question 7
A block of mass 5 kg is placed on a frictionless surface and a horizontal force of 10 N is applied to it. If the coefficient of static friction between the block and the surface is 0.5, determine the acceleration of the block.
A. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2
Question 8
A 10 kg block is attached to a horizontal, massless spring with spring cons\tant 100 N/m. The block is displaced by 2 m from its equilibrium position and released from rest. Find the maximum speed of the block.
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s
Question 9
A 1000 Hz AC voltage source is connected to a series RLC circuit with R = 10 Ω, L = 0.1 H, and C = 10 × 10^\( -6 \) F. The circuit is initially at rest. At t = 0, the switch is closed. Find the current in the circuit at t = 0.1 s.
A. 5 A
B. 10 A
C. 20 A
D. 50 A
Question 10
A 10 Ω resistor is connected in parallel with a 20 Ω resistor. What is the total resis\tance?
A. 6.67 Ω
B. 7.14 Ω
C. 8 Ω
D. 9 Ω
Question 11
A capacitor consists of two parallel plates separated by a dis\tance of 0.01 m. If the capaci\tance of the capacitor is 10^-6 F, what is the charge stored on the capacitor when a potential difference of 10 V is applied across it?
A. 10^-8 C
B. 10^-7 C
C. 10^-6 C
D. 10^-5 C
Question 12
A heat engine operates between two reservoirs at temperatures 500 K and 300 K. If the engine absorbs 1000 J of heat from the high-temperature reservoir, what is the efficiency of the engine?
A. 0.25
B. 0.30
C. 0.35
D. 0.40
Question 13
A ray of light passes from air into a glass block with re\fractive index 1.5. If the angle of incidence is 30°, find the angle of re\fraction.
A. 20°
B. 30°
C. 40°
D. 50°
Question 14
A radioactive sample decays from 100 g to 50 g in 10 days. What is the half-life of the sample?
A. 5 days
B. 10 days
C. 15 days
D. 20 days
Question 15
A particle of mass 2 kg is moving in a circular path with a radius of 5 m. The particle has a velocity of 10 m/s. What is the centripetal acceleration?
A. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2

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