POST UTME MADONNA UNIVERSITY 2017 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A spring with a spring cons\tant of 100 N/m is stretched by 2 m. What is the work done in stretching the spring?
A. 200 J
B. 400 J
C. 600 J
D. 800 J
Question 2
A beam of light passes through a prism and is re\fracted at an angle of 30°. If the angle of incidence is 20°, calculate the angle of re\fraction u\sing Snell's law: n1 \sin(θ1) = n2 \sin(θ2).
A. 20°
B. 30°
C. 40°
D. 50°
Question 3
A block of mass 5 kg is susp\ended from a spring with a spring cons\tant of 200 N/m. If the block is displaced by 0.2 m from its equilibrium position and released, calculate the time period of the oscillations.
A. 1 s
B. 2 s
C. 3 s
D. 4 s
Question 4
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 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 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 7
A particle of mass 2 kg is attached to a spring with a spring cons\tant of 100 N/m. It is displaced by 0.5 m from its equilibrium position and released from rest. Assuming the motion is simple harmonic, calculate the maximum speed of the particle.
A. 1 m/s
B. 2 m/s
C. 3 m/s
D. 4 m/s
Question 8
A block of mass 5 kg is moving on a frictionless surface with a speed of 2 m/s. If a force of 10 N is applied perp\endicular to the motion, what is the new speed?
A. 2.5 m/s
B. 3 m/s
C. 3.5 m/s
D. 4 m/s
Question 9
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 10
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 11
A light ray passes from a glass slab of re\fractive index 1.5 into air. If the angle of incidence is 40°, what is the angle of re\fraction?
A. 30°
B. 35°
C. 40°
D. 45°
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 circuit consists of a 12 Ω resistor, a 20 Ω resistor, and a 10 Ω resistor connected in series. If a voltage of 24 V is applied across the circuit, what is the current flowing through the circuit?
A. 0.5 A
B. 1 A
C. 1.5 A
D. 2 A
Question 14
A circuit consists of a 10 Ω resistor and a 20 Ω resistor connected in parallel. If a 12 V battery is connected across the circuit, calculate the total current u\sing Kirchhoff's current law.
A. 0.5 A
B. 1.0 A
C. 2.0 A
D. 3.0 A
Question 15
A 200 V AC supply is connected to a circuit containing a 50 Ω resistor and a 20 μF capacitor in series. Calculate the impedance of the circuit and the phase angle between the voltage and current.
A. 60 Ω, 45°
B. 50 Ω, 30°
C. 55 Ω, 40°
D. 65 Ω, 50°

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