POST UTME SKYLINE UNIVERSITY 2022 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A parallel plate capacitor has a capaci\tance of 10 μF. If a potential difference of 20 V is applied across the plates, what is the energy stored in the capacitor?
A. 0.2 J
B. 0.4 J
C. 0.6 J
D. 0.8 J
Question 2
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 3
A simple harmonic motion has a time period of 2 s and an amplitude of 3 m. If the initial phase angle is 60°, calculate the displacement at time t = 1 s.
A. 2 m
B. 3 m
C. 4 m
D. 5 m
Question 4
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 5
A parallel plate capacitor has a capaci\tance of 20 μF. If a potential difference of 30 V is applied across the plates, what is the charge stored on the plates?
A. 0.6 C
B. 0.8 C
C. 1 C
D. 1.2 C
Question 6
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 subject to a centripetal force of 12 N, what is the magnitude of the force?
A. 8 N
B. 12 N
C. 16 N
D. 24 N
Question 7
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 8
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 centripetal acceleration?
A. 12 m/s^2
B. 16 m/s^2
C. 20 m/s^2
D. 24 m/s^2
Question 9
A gas is heated from 300 K to 400 K. If the initial volume is 2 m^3 and the final volume is 3 m^3, calculate the work done.
A. 100 J
B. 200 J
C. 300 J
D. 400 J
Question 10
A 100 W light bulb is connected to a 220 V power source. If the resis\tance of the light bulb is 10 Ω, what is the current flowing through the bulb?
A. 0.5 A
B. 1 A
C. 2 A
D. 4 A
Question 11
A quantum particle is in a state described by the wave function \psi(x) = Ae^{-\alpha x^2}. If the particle is measured to be at position x = 2, what is the probability of finding it at that position?
A. 0.5
B. 0.25
C. 0.75
D. 0.9
Question 12
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 13
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 14
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 15
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

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