POST UTME EKSU 2020 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A gas is contained in a cylinder of volume 2 L at a pressure of 2 atm. If the temperature is increased by 10°C, what is the new pressure?
A. 2.5 atm
B. 3 atm
C. 3.5 atm
D. 4 atm
Question 2
A radioactive sample has a half-life of 5 years. If the initial activity is 100 Bq, what is the activity after 10 years?
A. 25 Bq
B. 50 Bq
C. 75 Bq
D. 100 Bq
Question 3
A spring with a spring cons\tant of 100 N/m is stretched by 10 cm. If the spring is then released, what is the maximum velocity of the spring?
A. 0.5 m/s
B. 1.0 m/s
C. 2.0 m/s
D. 5.0 m/s
Question 4
A particle of charge 2 μC is moving in a circular path of radius 2 m with a cons\tant speed of 3 m/s. What is the magnitude of the magnetic field at the center of the circle?
A. 0.1 T
B. 0.2 T
C. 0.3 T
D. 0.4 T
Question 5
A point charge of 2 μC is placed at the origin. Find the electric potential at a point 3 m away from the charge.
A. 1200 V
B. 1500 V
C. 1800 V
D. 2000 V
Question 6
A radioactive sample emits \alpha particles with a half-life of 5 days. If the initial activity is 100 Bq, what is the activity after 10 days?
A. 12.5 Bq
B. 25 Bq
C. 50 Bq
D. 100 Bq
Question 7
A particle of mass 2 kg is attached to a spring with a spring cons\tant of 100 N/m. If the particle is displaced by 0.5 m from its equilibrium position and released from rest, determine the maximum velocity of the particle.
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s
Question 8
A wave has a frequency of 50 Hz and a wavelength of 10 m. If the wave is traveling in the positive x-direction, what is the direction of the particle velocity?
A. positive x-direction
B. negative x-direction
C. positive y-direction
D. negative y-direction
Question 9
A heat engine operates between the temperatures 300 K and 400 K. Find the efficiency of the engine.
A. 0.2
B. 0.3
C. 0.4
D. 0.5
Question 10
A fluid of density 1000 kg/m^3 is flowing through a horizontal pipe with a cross-sectional area of 10^\( -4 \) m^2. If the pressure difference between the two \ends of the pipe is 1000 Pa, what is the velocity of the fluid?
A. 0.5 m/s
B. 1.0 m/s
C. 2.0 m/s
D. 5.0 m/s
Question 11
A body of mass 5 kg is at rest on a frictionless surface. A force of 10 N is applied to it. Find the acceleration of the body.
A. 2 m/s²
B. 5 m/s²
C. 10 m/s²
D. 15 m/s²
Question 12
A force of 20 N acts on an object, cau\sing it to accelerate at 2 m/s^2. If the mass of the object is 5 kg, what is the net force acting on the object?
A. 10 N
B. 20 N
C. 30 N
D. 40 N
Question 13
A body of mass 5 kg is moving in a straight line with a velocity of 10 m/s. What is the work done by a force of 2 N acting on the body?
A. -20 J
B. -10 J
C. 10 J
D. 20 J
Question 14
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 60° above the horizontal. Determine the maximum height reached by the projectile.
A. 10 m
B. 15 m
C. 20 m
D. 25 m
Question 15
A radioactive sample decays from 100 mg to 50 mg in 10 days. If the half-life of the sample is 20 days, determine the decay cons\tant.
A. 0.01 min^-1
B. 0.02 min^-1
C. 0.03 min^-1
D. 0.04 min^-1

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