POST UTME SKYLINE UNIVERSITY 2018 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A radioactive sample has a half-life of 10 years. If the initial activity of the sample is 100 Bq, what is the activity of the sample after 20 years?
A. 12.5 Bq
B. 25 Bq
C. 50 Bq
D. 100 Bq
Question 2
A body of mass 5 kg is moving with a velocity of 10 m/s. If it is subjected to a force of 20 N, what is the acceleration of the body?
A. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2
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 magnitude of the force?
A. 10 N
B. 12 N
C. 15 N
D. 20 N
Question 4
A block of mass 5 kg is placed on a horizontal, frictionless surface. A horizontal force of 10 N is applied to the block, cau\sing it to accelerate at 2 m/s². What is the normal force exerted by the surface on the block?
A. 20 N
B. 25 N
C. 30 N
D. 35 N
Question 5
A photon of wavelength 500 nm is incident on a metal surface. If the work function of the metal is 2.5 eV, what is the maximum kinetic energy of the emitted electron?
A. 1.25 eV
B. 2.5 eV
C. 3.75 eV
D. 5 eV
Question 6
A 5 kg block is moving in a straight line with a cons\tant acceleration of 2 m/s^2. If the initial velocity is 4 m/s, calculate the velocity after 3 seconds.
A. 6 m/s
B. 7 m/s
C. 8 m/s
D. 9 m/s
Question 7
A light ray passes through a prism of re\fractive index 1.5, and is incident at an angle of 30° to the normal. If the angle of deviation is 60°, what is the angle of emergence?
A. 45°
B. 30°
C. 60°
D. 75°
Question 8
A heat engine operates between the temperatures of 300 K and 400 K. If it produces 100 J of work, what is the efficiency of the engine?
A. 0.25
B. 0.30
C. 0.35
D. 0.40
Question 9
A \tank is filled with water to a height of 10 m. What is the pressure at the bottom of the \tank?
A. 100 kPa
B. 200 kPa
C. 300 kPa
D. 400 kPa
Question 10
A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in series. What is the current flowing through the circuit?
A. 1 A
B. 2 A
C. 3 A
D. 4 A
Question 11
A convex lens has a focal length of 20 cm. If an object is placed 30 cm in front of the lens, what is the image dis\tance?
A. -60 cm
B. -30 cm
C. -20 cm
D. 10 cm
Question 12
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 30° above the horizontal. What is the maximum height reached by the projectile?
A. 10 m
B. 15 m
C. 20 m
D. 25 m
Question 13
A radioactive sample has a half-life of 10 years. If the initial activity is 100 Bq, what is the activity after 20 years?
A. 12.5 Bq
B. 25 Bq
C. 50 Bq
D. 100 Bq
Question 14
A 10 Ω resistor is connected in series with a 20 μF capacitor and a 50 Hz AC voltage source. What is the impedance of the circuit?
A. 10 Ω
B. 15 Ω
C. 20 Ω
D. 25 Ω
Question 15
A particle of mass 1 kg is moving in a straight line with an initial velocity of 5 m/s. If it experiences a cons\tant acceleration of 2 m/s^2, what is its velocity after 3 s?
A. 7 m/s
B. 9 m/s
C. 11 m/s
D. 13 m/s

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