POST UTME DELSU 2025 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 2 kg block is placed on a frictionless surface and a horizontal force of 10 N is applied to it. What is the acceleration of the block?
A. 0.5 m/s^2
B. 1 m/s^2
C. 2 m/s^2
D. 5 m/s^2
Question 2
A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in series. What is the current flowing through the 4 Ω resistor?
A. 0.5 A
B. 1.0 A
C. 1.5 A
D. 2.0 A
Question 3
A 1000 J of work is done in lifting a 200 N block to a height of 5 m. What is the efficiency of the machine used?
A. 20%
B. 30%
C. 40%
D. 50%
Question 4
A 2.5 mH inductor is connected in series with a 10 Ω resistor and a 20 V AC source. If the frequency of the source is 50 Hz, calculate the impedance of the circuit u\sing the formula \( Z = \sqrt{R^2 + X_L^2} \), where \( X_L = 2pi f L \).
A. 14.14 Ω
B. 15.62 Ω
C. 17.32 Ω
D. 18.85 Ω
Question 5
A beam of light passes from air into a glass of re\fractive index 1.5. If the angle of incidence is 30°, calculate the angle of re\fraction u\sing Snell's law \( n_1 \sin \theta_1 = n_2 \sin \theta_2 \).
A. 20°
B. 22.5°
C. 25°
D. 27.5°
Question 6
A particle of mass 0.5 kg is attached to a spring with a spring cons\tant of 100 N/m. If the particle is displaced by 2 m from its equilibrium position and released from rest, calculate the frequency of oscillation u\sing the equation \( f = \frac{1}{2pi} \sqrt{\frac{k}{m}} \).
A. 0.25 Hz
B. 0.5 Hz
C. 0.75 Hz
D. 1 Hz
Question 7
A 100 W light bulb is connected to a 220 V AC source. If the power factor of the bulb is 0.8, calculate the current drawn by the bulb u\sing the formula \( P = VI \cos phi \), where ( phi ) is the power factor.
A. 0.45 A
B. 0.5 A
C. 0.55 A
D. 0.6 A
Question 8
A capacitor of capaci\tance 10 μF is connected in series with a resistor of resis\tance 20 Ω. If a voltage of 50 V is applied across the circuit, calculate the current flowing through the circuit.
A. 0.25 A
B. 0.5 A
C. 0.75 A
D. 1 A
Question 9
A capacitor consists of two parallel plates separated by a dis\tance of 1 mm. If the capaci\tance is 10 μF, what is the charge stored on the capacitor when a potential difference of 5 V is applied?
A. 50 μC
B. 100 μC
C. 150 μC
D. 200 μC
Question 10
A gas is contained in a cylinder of volume V and is heated from temperature T1 to temperature T2. U\sing the ideal gas law, derive an expression for the change in pressure of the gas.
A. \Delta P = \frac{nR\Delta T}{V}
B. \Delta P = \frac{nRT1}{V}
C. \Delta P = \frac{nRT2}{V}
D. \Delta P = \frac{nR\( T1 - T2 \)}{V}
Question 11
A sound wave has a frequency of 200 Hz and a speed of 340 m/s. Calculate the wavelength of the wave.
A. 0.0017 m
B. 0.0018 m
C. 0.0019 m
D. 0.002 m
Question 12
A particle of mass 0.5 kg is moving in a circular path of radius 2 m with a speed of 4 m/s. What is the magnitude of the force acting on the particle?
A. 2 N
B. 4 N
C. 6 N
D. 8 N
Question 13
A beam of light is incident on a prism at an angle of 30°. If the re\fractive index of the prism is 1.5, calculate the angle of re\fraction.
A. 20°
B. 30°
C. 40°
D. 50°
Question 14
A circuit consists of a 100 Ω resistor, a 200 Ω resistor, and a 300 Ω resistor connected in series. If a voltage of 12 V is applied across the circuit, what is the current in the circuit?
A. 0.1 A
B. 0.2 A
C. 0.3 A
D. 0.4 A
Question 15
A particle of mass 5 kg is moving in a circular path with a radius of 2 m. If the particle has a speed of 10 m/s, what is the magnitude of the centripetal acceleration?
A. 10 m/s^2
B. 20 m/s^2
C. 30 m/s^2
D. 40 m/s^2

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