POST UTME UNILORIN 2017 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A ray of light passes from air into a glass block with a re\fractive index of 1.5. If the angle of incidence is 30°, what is the angle of re\fraction?
A. 20°
B. 30°
C. 40°
D. 50°
Question 2
A particle of mass 2.00 kg moves in a circular path of radius 3.00 m with a cons\tant speed of 4.00 m/s. Calculate the magnitude of the net force acting on the particle.
A. 10.0 N
B. 20.0 N
C. 30.0 N
D. 40.0 N
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 experiences a centripetal acceleration of 2 m/s^2, what is the magnitude of the net force acting on the particle?
A. 8 N
B. 10 N
C. 12 N
D. 16 N
Question 4
A capacitor consists of two parallel plates, each with an area of 0.1 m^2 and 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^-5 C
B. 10^-6 C
C. 10^-7 C
D. 10^-8 C
Question 5
A 2 kg block is moving with a velocity of 5 m/s. If the block experiences a force of 10 N for 2 seconds, what is the change in its momentum?
A. 15 kg m/s
B. 20 kg m/s
C. 25 kg m/s
D. 30 kg m/s
Question 6
A 5 V battery is connected to a 10 Ω resistor in series. What is the current flowing through the circuit?
A. 0.2 A
B. 0.3 A
C. 0.4 A
D. 0.5 A
Question 7
A uniform magnetic field of strength 2.5 T is applied to a coil of wire with 50 turns. If the coil has a radius of 0.05 m and a resis\tance of 10 Ω, what is the induced emf when the coil is rotated through an angle of 90° in 0.1 s?
A. 0.25 V
B. 0.5 V
C. 1 V
D. 2 V
Question 8
A uniform solid sphere of mass M and radius R is placed in a uniform gravitational field. Find the gravitational potential energy of the sphere.
A. \( \frac{2}{5} \frac{GM^2}{R} \)
B. \( \frac{3}{5} \frac{GM^2}{R} \)
C. \( \frac{4}{5} \frac{GM^2}{R} \)
D. \( \frac{5}{5} \frac{GM^2}{R} \)
Question 9
A 10 Ω resistor is connected in series with a 20 Ω resistor and a 30 Ω resistor. What is the equivalent resis\tance of the circuit?
A. 40 Ω
B. 50 Ω
C. 60 Ω
D. 70 Ω
Question 10
A projectile is launched at an angle of 30° to the horizontal with an initial velocity of 20 m/s. What is the time of flight?
A. 2 s
B. 4 s
C. 6 s
D. 8 s
Question 11
A light ray is incident on a glass slab at an angle of 45°. If the re\fractive index of the glass is 1.5, calculate the angle of re\fraction.
A. 30°
B. 45°
C. 60°
D. 75°
Question 12
A circuit consists of a 12 Ω resistor and a 20 Ω resistor connected in parallel. If a voltage of 24 V is applied across the circuit, what is the current through the 12 Ω resistor?
A. \( 0.8 , \text{A} \)
B. \( 1.2 , \text{A} \)
C. \( 1.6 , \text{A} \)
D. \( 2.0 , \text{A} \)
Question 13
A wave has a frequency of 50 Hz and a wavelength of 2 m. What is the speed of the wave?
A. 100 m/s
B. 200 m/s
C. 300 m/s
D. 400 m/s
Question 14
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 acceleration of the particle?
A. 4 m/s^2
B. 6 m/s^2
C. 8 m/s^2
D. 10 m/s^2
Question 15
A simple harmonic motion has a maximum displacement of 5 m and a period of 2 s. What is the angular frequency?
A. 1 rad/s
B. 2 rad/s
C. 3 rad/s
D. 4 rad/s

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