POST UTME MADONNA UNIVERSITY 2017 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A light ray passes from air into a glass slab of re\fractive index 1.5. If the angle of incidence is 30°, what is the angle of re\fraction?
A. 20°
B. 25°
C. 30°
D. 35°
Question 2
A gas is enclosed in a container of volume 2 L at a pressure of 1 atm. If the temperature is increased by 10 K, what is the new pressure?
A. 1.1 atm
B. 1.2 atm
C. 1.3 atm
D. 1.4 atm
Question 3
A uniform magnetic field of 2 T is applied to a coil of wire with 50 turns. If the coil is rotated by 90° in 0.1 s, calculate the induced emf u\sing Faraday's law of induction.
A. 0.5 V
B. 1.0 V
C. 2.0 V
D. 5.0 V
Question 4
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. What is the magnitude of the force acting on the particle?
A. 10 N
B. 20 N
C. 30 N
D. 40 N
Question 5
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 angular velocity of the particle?
A. 2 rad/s
B. 4 rad/s
C. 6 rad/s
D. 8 rad/s
Question 6
A current of 5 A flows through a resistor of 10 Ω for 2 seconds. What is the energy dissipated by the resistor?
A. 50 J
B. 100 J
C. 150 J
D. 200 J
Question 7
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. What is the magnitude of the force acting on the particle?
A. 12 N
B. 16 N
C. 20 N
D. 24 N
Question 8
A 2.5 V battery is connected in series with a 5 ohm resistor and a 10 ohm resistor. If the current through the 5 ohm resistor is 0.5 A, what is the current through the 10 ohm resistor?
A. 0.25 A
B. 0.5 A
C. 0.75 A
D. 1 A
Question 9
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 60° above the horizontal. If the air resis\tance is negligible, what is the maximum height reached by the projectile?
A. 10 m
B. 15 m
C. 20 m
D. 25 m
Question 10
A capacitor consists of two parallel plates separated by a dis\tance of 2 mm. If a charge of 10 μC is placed on one plate, what is the potential difference between the plates?
A. 5 V
B. 10 V
C. 15 V
D. 20 V
Question 11
A convex lens of focal length 20 cm is placed in a beam of light. If the object dis\tance is 30 cm, calculate the image dis\tance u\sing the lens equation: 1/f = 1/do + 1/di.
A. 10 cm
B. 20 cm
C. 30 cm
D. 40 cm
Question 12
A radioactive sample decays from 100 mg to 50 mg in 10 days. If the half-life of the sample is 20 days, calculate the decay cons\tant (λ) u\sing the formula: λ = ln(2)/t1/2.
A. 0.05 d^-1
B. 0.10 d^-1
C. 0.15 d^-1
D. 0.20 d^-1
Question 13
A photon of wavelength 400 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 14
A magnetic field of 0.5 T is applied to a coil of 100 turns and a resis\tance of 10 Ω. If the coil is connected to a 200 V AC supply, calculate the current in the coil.
A. 20 A
B. 30 A
C. 40 A
D. 50 A
Question 15
A particle of mass 1 kg 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 force acting on the particle?
A. 6 N
B. 9 N
C. 12 N
D. 15 N

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