POST UTME SKYLINE UNIVERSITY 2019 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A body of mass 5 kg is moving with a velocity of 10 m/s. If it is subjected to a force of 20 N, what is the acceleration of the body?
A. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2
Question 2
A radioactive sample has a half-life of 5 years. If the initial activity of the sample is 100 Bq, what is the activity of the sample after 10 years?
A. 25 Bq
B. 50 Bq
C. 75 Bq
D. 100 Bq
Question 3
A block of mass 5 kg is moving with a speed of 10 m/s on a frictionless surface. If the block is subjected to a cons\tant force of 20 N, what is the acceleration of the block?
A. 0.5 m/s^2
B. 1.0 m/s^2
C. 1.5 m/s^2
D. 2.0 m/s^2
Question 4
A circuit consists of a 10 Ω resistor and a 20 Ω resistor connected in parallel. If a voltage of 50 V is applied across the circuit, what is the current flowing through the 10 Ω resistor?
A. 0.5 A
B. 1.0 A
C. 1.5 A
D. 2.0 A
Question 5
A particle moves in a circular path with a radius of 2 m and a speed of 4 m/s. What is the magnitude of the acceleration of the particle?
A. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2
Question 6
A simple harmonic motion has a maximum displacement of 2 m and a frequency of 3 Hz. If the amplitude of the motion is doubled, what is the new frequency of the motion?
A. 1.5 Hz
B. 2.5 Hz
C. 3.5 Hz
D. 4.5 Hz
Question 7
A gas is contained in a cylinder of volume 2 L at a pressure of 1 atm. If the temperature is increased by 10°C, what is the new pressure?
A. 1.1 atm
B. 1.2 atm
C. 1.3 atm
D. 1.4 atm
Question 8
A block of mass $m$ is placed on a frictionless surface and is subject to a force $F$ at an angle $\theta$ to the horizontal. If the block is in equilibrium, calculate the magnitude of the normal force $N$ in terms of $m$, $F$, and $\theta$.
A. \( N = mg \cos \theta \)
B. \( N = mg \sin \theta \)
C. \( N = F \cos \theta \)
D. \( N = F \sin \theta \)
Question 9
A parallel plate capacitor has a capaci\tance of 2 μF. If a potential difference of 10 V is applied across the plates, what is the charge stored on each plate?
A. 20 μC
B. 40 μC
C. 60 μC
D. 80 μC
Question 10
A 10 μF capacitor is connected in series with a 20 Ω resistor and a 5 V battery. What is the current flowing through the circuit?
A. 0.25 A
B. 0.5 A
C. 1 A
D. 2 A
Question 11
A resistor of 10 Ω is connected in series with a resistor of 20 Ω. What is the equivalent resis\tance of the circuit?
A. 10 Ω
B. 20 Ω
C. 30 Ω
D. 40 Ω
Question 12
A 100 W bulb is connected to a 220 V power supply. What is the current flowing through the bulb?
A. 0.45 A
B. 0.5 A
C. 0.55 A
D. 0.6 A
Question 13
A wave of frequency $f$ and wavelength $lambda$ is traveling through a medium with speed $v$. If the wave is subject to a Doppler shift, calculate the new frequency $f'$ in terms of $f$, $lambda$, and $v$.
A. \( f' = f \frac{v}{v - v_s} \)
B. \( f' = f \frac{v_s}{v - v_s} \)
C. \( f' = f \frac{v_s}{v + v_s} \)
D. \( f' = f \frac{v}{v + v_s} \)
Question 14
A radioactive sample has a half-life of 5 days. If the initial activity is 100 Bq, what is the activity after 10 days?
A. 12.5 Bq
B. 25 Bq
C. 50 Bq
D. 100 Bq
Question 15
A capacitor consists of two parallel plates separated by a dis\tance of 2 mm. The capaci\tance of the capacitor is 10 μF. What is the charge stored on the capacitor when a potential difference of 5 V is applied across it?
A. 0.05 C
B. 0.1 C
C. 0.5 C
D. 1 C

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