POST UTME ABU 2019 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A parallel beam of light of wavelength 500 nm is incident on a glass slab of re\fractive index 1.5. If the angle of incidence is 30°, calculate the angle of re\fraction.
A. 20°
B. 25°
C. 30°
D. 35°
Question 2
A gas is heated from 20°C to 80°C. If the initial volume is 1 L, calculate the final volume.
A. 2 L
B. 3 L
C. 4 L
D. 5 L
Question 3
A body of mass 2 kg is moving with a velocity of 5 m/s. If a force of 10 N is applied to the body, calculate the acceleration produced.
A. 0.5 m/s²
B. 1 m/s²
C. 2 m/s²
D. 5 m/s²
Question 4
A gas is contained in a cylinder of volume 10 L at a pressure of 100 kPa. If the temperature is increased by 20 K, what is the new pressure?
A. 120 kPa
B. 140 kPa
C. 160 kPa
D. 180 kPa
Question 5
A 100 Ω resistor is connected in series with a 200 Ω resistor and a 300 Ω resistor. A 12 V DC source is connected across the circuit. Calculate the current flowing through the circuit.
A. 0.2 A
B. 0.4 A
C. 0.6 A
D. 0.8 A
Question 6
A gas at 300 K and 1 atm expands to 2 atm at cons\tant temperature. Calculate the final volume of the gas.
A. 2 L
B. 4 L
C. 6 L
D. 8 L
Question 7
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 angular frequency of the particle.
A. 1 rad/s
B. 2 rad/s
C. 5 rad/s
D. 10 rad/s
Question 8
A 1000 Hz AC voltage source is connected to a 50 Ω resistor. If the maximum voltage is 100 V, what is the maximum current in the circuit?
A. 0.5 A
B. 1 A
C. 2 A
D. 5 A
Question 9
A parallel plate capacitor has a capaci\tance of 10 μF and is charged to a potential difference of 100 V. What is the energy stored in the capacitor?
A. 0.1 J
B. 1 J
C. 10 J
D. 100 J
Question 10
A capacitor of capaci\tance 10 μF is connected across a 20 V DC source. Calculate the charge stored in the capacitor.
A. 0.2 C
B. 0.2 μC
C. 20 μC
D. 200 μC
Question 11
A particle of mass 2 kg is attached to a spring with spring cons\tant 100 N/m. If the particle is displaced by 0.1 m from its equilibrium position and released from rest, what is its angular frequency?
A. 1 rad/s
B. 2 rad/s
C. 10 rad/s
D. 20 rad/s
Question 12
A thermos flask is filled with 1 L of water at 20°C. If the water is heated to 80°C, calculate the amount of heat energy transferred.
A. 1000 J
B. 2000 J
C. 3000 J
D. 4000 J
Question 13
A magnetic field of strength 0.5 T is applied to a current-carrying wire of length 1 m. If the current is 2 A, calculate the force experienced by the wire.
A. 0.1 N
B. 0.5 N
C. 1 N
D. 5 N
Question 14
A 3D Gaussian wave function is given by ψ(x,y,z) = e^\( -\( x^2+y^2+z^2 \ \)/2a^2). What is the probability density of finding the particle at a point (x,y,z) in space?
A. e^\( -\( x^2+y^2+z^2 \ \)/a^2)
B. e^\( -\( x^2+y^2+z^2 \ \)/2a^2)
C. e^\( -\( x^2+y^2+z^2 \ \)/4a^2)
D. e^\( -\( x^2+y^2+z^2 \ \)/a^4)
Question 15
A 100 W bulb is connected to a 220 V AC source. Calculate the current flowing through the bulb.
A. 0.4 A
B. 0.6 A
C. 0.8 A
D. 1 A

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