POST UTME SKYLINE UNIVERSITY 2022 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A photon has an energy of 2.5 eV. What is its wavelength?
A. 500 nm
B. 600 nm
C. 700 nm
D. 800 nm
Question 2
A sound wave with frequency f is traveling through a medium with speed v. If the wave is reflected off a surface, what is the frequency of the reflected wave?
A. f
B. 2f
C. f/2
D. v/f
Question 3
A 5 kg block is attached to a horizontal, massless spring with a force cons\tant of 200 N/m. The block is displaced by 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 4
A particle of mass m is moving in a circular orbit of radius r under the influence of a central force F. If the particle's angular momentum is L, what is the force F in terms of m, r, and L?
A. \frac{mL^2}{r^3}
B. \frac{mL}{r^2}
C. \frac{mL^2}{r^2}
D. \frac{mL}{r}
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 10 N, calculate the work done by the force in 2 seconds.
A. 20 J
B. 30 J
C. 40 J
D. 50 J
Question 6
A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in series. What is the current in the circuit?
A. 1 A
B. 2 A
C. 3 A
D. 4 A
Question 7
A capacitor of capaci\tance 10 μF is connected in series with a 20 Ω resistor and a 10 V DC source. If the capacitor is initially uncharged, calculate the time taken for the capacitor to become fully charged.
A. 0.1 s
B. 0.2 s
C. 0.3 s
D. 0.4 s
Question 8
A ray of light 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. 30°
C. 40°
D. 50°
Question 9
A block of mass 3 kg is placed on a frictionless surface and attached to a horizontal spring with a force cons\tant of 30 N/m. If the block is displaced by 3 m from its equilibrium position and released from rest, what is the maximum speed of the block?
A. 3 m/s
B. 6 m/s
C. 9 m/s
D. 12 m/s
Question 10
A projectile is fired from the ground with an initial velocity of 20 m/s at an angle of 60° to the horizontal. If the acceleration due to gravity is 10 m/s^2, calculate the time of flight.
A. 2 s
B. 4 s
C. 6 s
D. 8 s
Question 11
A circuit consists of a resistor R, an inductor L, and a capacitor C connected in series. If the circuit is driven by an AC voltage source with frequency f, what is the impedance of the circuit?
A. \sqrt{R^2 + \( X_L - X_C \)^2}
B. R + X_L - X_C
C. R - X_L + X_C
D. R + X_L + X_C
Question 12
A sound wave with frequency f is traveling through a medium with speed v. If the wave is reflected off a surface, what is the frequency of the reflected wave?
A. f
B. 2f
C. f/2
D. v/f
Question 13
A magnetic field of 2 T is applied to a coil of wire with 100 turns. If the area of the coil is 0.01 m², what is the magnetic flux?
A. 0.02 Wb
B. 0.04 Wb
C. 0.06 Wb
D. 0.08 Wb
Question 14
A 10 μF capacitor is connected in parallel with a 20 μF capacitor. If a 10 V DC source is connected across the combination, calculate the equivalent capaci\tance of the combination.
A. 10 μF
B. 20 μF
C. 30 μF
D. 40 μF
Question 15
A parallel plate capacitor has a capaci\tance of 10 μF and is charged to a potential difference of 100 V. If the dis\tance between the plates is doubled, what is the new potential difference?
A. 50 V
B. 100 V
C. 200 V
D. 250 V

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