POST UTME WELLSPRING UNIVERSITY 2021 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A capacitor consists of two parallel plates, each of area 0.1 m^2, separated by a dis\tance of 0.01 m. If the capaci\tance of the capacitor is 10^-6 F, what is the magnitude of the electric field between the plates when a potential difference of 10 V is applied?
A. 10^6 V/m
B. 10^5 V/m
C. 10^4 V/m
D. 10^3 V/m
Question 2
A light ray passes through a prism and is re\fracted. If the angle of incidence is 30° and the angle of re\fraction is 20°, what is the angle of deviation?
A. 40°
B. 50°
C. 60°
D. 70°
Question 3
A 100 V, 50 Hz AC source is connected to a 20 Ω resistor in series with a 5 mH inductor. Determine the impedance of the circuit.
A. 25.5 Ω
B. 26.5 Ω
C. 27.5 Ω
D. 28.5 Ω
Question 4
A \tank of water is filled to a height of 10 m. If a small hole of area 0.01 m^2 is drilled at the bottom of the \tank, what is the rate of flow of water out of the \tank?
A. 0.1 m^3/s
B. 0.2 m^3/s
C. 0.3 m^3/s
D. 0.4 m^3/s
Question 5
A radioactive sample decays with 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 6
A block of mass 5 kg is attached to a horizontal spring with a force cons\tant of 100 N/m. If the block is displaced by 0.2 m from its equilibrium position and released from rest, what is the maximum speed of the block?
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s
Question 7
A body of mass 2 kg is moving with a velocity of 4 m/s. If the body is subjected to a force of 10 N, determine 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 8
A light source is placed at a dis\tance of 2 m from a convex lens of focal length 1 m. If the lens is placed in a medium of re\fractive index 1.5, what is the position of the image?
A. 1 m
B. 2 m
C. 3 m
D. 4 m
Question 9
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 change in its kinetic energy?
A. 50 J
B. 100 J
C. 150 J
D. 200 J
Question 10
A particle of mass 1 kg is moving in a straight line with a velocity of 2 m/s. If it is subject to a force of 10 N, what is its acceleration?
A. 5 m/s^2
B. 10 m/s^2
C. 15 m/s^2
D. 20 m/s^2
Question 11
A coil of wire has a resis\tance of 10 Ω and an induc\tance of 5 H. If the current flowing through the coil is 2 A, what is the induced emf?
A. 10 V
B. 20 V
C. 30 V
D. 40 V
Question 12
A particle of mass m is moving in a circular path of radius r with a cons\tant speed v. What is the magnitude of the centripetal acceleration?
A. v^2/r
B. v/r
C. 2v^2/r
D. v^2/2r
Question 13
A particle of mass 0.1 kg is moving in a circular orbit of radius 0.2 m with a speed of 0.5 m/s. What is the centripetal force acting on the particle?
A. 0.05 N
B. 0.1 N
C. 0.2 N
D. 0.5 N
Question 14
A solid sphere of radius 0.1 m and mass 0.5 kg is susp\ended from a wire of length 0.2 m. If the sphere is displaced by 0.01 m from its equilibrium position, what is the period of small oscillations?
A. 0.5 s
B. 1 s
C. 2 s
D. 5 s
Question 15
A particle moves in a circular path with a cons\tant speed of 5 m/s. If the radius of the circle is 2 m, what is the angular velocity of the particle?
A. 2 rad/s
B. 4 rad/s
C. 6 rad/s
D. 8 rad/s

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