POST UTME SKYLINE UNIVERSITY 2021 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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. 10 Ω
B. 20 Ω
C. 30 Ω
D. 60 Ω
Question 2
A 10 Ω resistor is connected in series with a 20 Ω resistor and a 30 Ω resistor. What is the equivalent resis\tance?
A. 10 Ω
B. 20 Ω
C. 30 Ω
D. 40 Ω
Question 3
A capacitor of 10 μF is connected in series with a resistor of 20 Ω. If a voltage of 10 V is applied across the circuit, what is the time cons\tant?
A. 0.2 s
B. 0.4 s
C. 0.6 s
D. 0.8 s
Question 4
A particle of mass 2 kg is attached to a spring with spring cons\tant 100 N/m. It is displaced by 0.2 m from its equilibrium position and released from rest. Assuming the motion is simple harmonic, calculate the time taken for the particle to reach its maximum velocity.
A. 0.1 s
B. 0.2 s
C. 0.5 s
D. 1 s
Question 5
A 100 μF capacitor is connected in parallel with a 200 μF capacitor. What is the equivalent capaci\tance of the circuit?
A. 100 μF
B. 200 μF
C. 300 μF
D. 400 μF
Question 6
A magnetic field of 0.5 T is applied to a coil of 100 turns. If the area of the coil is 0.1 m^2, what is the magnetic flux?
A. 0.05 Wb
B. 0.1 Wb
C. 0.15 Wb
D. 0.2 Wb
Question 7
A 10 Ω resistor is connected in series with a 20 Ω resistor and a 50 Ω resistor. What is the equivalent resis\tance of the circuit?
A. 10 Ω
B. 20 Ω
C. 30 Ω
D. 40 Ω
Question 8
A block of mass 5 kg is placed on a frictionless surface and attached to a horizontal spring with a force cons\tant of 200 N/m. If the block is displaced by 0.2 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 9
A parallel plate capacitor with plate separation $d$ and plate area $A$ is connected to a battery of electromotive force $V$. If the dielectric cons\tant of the material between the plates is $kappa$, the capaci\tance of the capacitor is given by $C = \frac{kappa epsilon_0 A}{d}$. If the battery is disconnected and a charge $Q$ is removed from the capacitor, the electric field between the plates is given by $E = \frac{Q}{kappa epsilon_0 A}$. What is the energy stored in the capacitor when the charge is $Q$?
A. 0.5\kappa\epsilon_0\frac{Q^2}{A}
B. \kappa\epsilon_0\frac{Q^2}{A}
C. \frac{Q^2}{2\kappa\epsilon_0 A}
D. \frac{Q^2}{\kappa\epsilon_0 A}
Question 10
A gas is contained in a cylinder with a volume of 2 L and a pressure of 1 atm. If the temperature is increased by 10°C, what is the new pressure of the gas?
A. 1.1 atm
B. 1.2 atm
C. 1.3 atm
D. 1.4 atm
Question 11
A point charge of 2 μC is placed at the origin of a coordinate system. What is the electric potential at a point 1 m away from the charge?
A. 1 × 10^3 V
B. 2 × 10^3 V
C. 3 × 10^3 V
D. 4 × 10^3 V
Question 12
A wave of frequency $f$ and wavelength $\lambda$ is propagating through a medium of speed $v$. What is the angular frequency of the wave?
A. 2\pi f
B. \frac{2\pi f}{\lambda}
C. \frac{2\pi v}{\lambda}
D. \frac{2\pi f}{v}
Question 13
A heat engine operates between two reservoirs at temperatures 300 K and 400 K. Calculate the efficiency of the engine.
A. 0.25
B. 0.30
C. 0.35
D. 0.40
Question 14
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 0.2 m from its equilibrium position and released from rest. What is its maximum speed?
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s
Question 15
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 acceleration of 2 m/s^2, what is the force exerted on the particle?
A. 8 N
B. 10 N
C. 12 N
D. 16 N

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