POST UTME LASU 2019 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 60° to the horizontal. What is the maximum height reached by the projectile?
A. 5 m
B. 10 m
C. 15 m
D. 20 m
Question 2
A particle of mass $m$ is confined to a one-dimensional box of length $L$. The wave function of the particle is given by (psi(x) = \sqrt{\frac{2}{L}} \sinleft\( \frac{npi x}{L}\right \)). What is the expectation value of the position operator for this particle?
A. \frac{L}{2}
B. \frac{L}{4}
C. \frac{3L}{4}
D. \frac{L}{3}
Question 3
A body of mass 5 kg is moving in a straight line with an initial velocity of 10 m/s. If it experiences a uniform acceleration of 2 m/s^2, what is its velocity after 5 seconds?
A. 20 m/s
B. 25 m/s
C. 30 m/s
D. 35 m/s
Question 4
A wire of length $L$ and cross-sectional area $A$ is stretched by a force $F$. What is the tension in the wire?
A. \frac{F}{A}
B. \frac{A}{F}
C. \frac{L}{F}
D. \frac{F}{L}
Question 5
A gas at a pressure of 3 atm and a temperature of 400 K is allowed to expand to a volume of 10 L. If the gas is ideal, what is the final pressure of the gas?
A. 1.5 atm
B. 2 atm
C. 2.5 atm
D. 3 atm
Question 6
A particle of mass 1 kg is moving in a circular path with a radius of 0.5 m. If the particle has a speed of 2 m/s, what is the magnitude of the centripetal force acting on the particle?
A. 2 N
B. 4 N
C. 6 N
D. 8 N
Question 7
A body of mass 2 kg is moving with a velocity of 4 m/s. If it is subjected to a force of 10 N, what is its acceleration?
A. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2
Question 8
A circuit consists of a 10 Ω resistor and a 20 Ω resistor connected in parallel. If a voltage of 12 V is applied across the circuit, what is the current flowing through the 10 Ω resistor?
A. 0.6 A
B. 0.8 A
C. 1.0 A
D. 1.2 A
Question 9
A parallel plate capacitor has a capaci\tance of 10 μF. If a potential difference of 5 V is applied across it, what is the charge stored on the capacitor?
A. 25 μC
B. 50 μC
C. 75 μC
D. 100 μC
Question 10
A gas is enclosed in a container with a movable piston. The gas is heated, cau\sing its pressure to increase. Which of the following statements is true about the change in the gas's volume?
A. The volume of the gas decreases.
B. The volume of the gas increases.
C. The volume of the gas remains cons\tant.
D. The volume of the gas becomes negative.
Question 11
A nucleus has a mass number of 240 and an atomic number of 92. What is the number of protons in the nucleus?
A. 92
B. 120
C. 240
D. 360
Question 12
A block of mass 2 kg is attached to a horizontal spring with a force cons\tant of 100 N/m. The block is displaced by 0.2 m from its equilibrium position and then released. What is the maximum speed of the block?
A. 0.2 m/s
B. 2 m/s
C. 4 m/s
D. 6 m/s
Question 13
A magnetic field is produced by a current-carrying wire. If the current in the wire is doubled, what happens to the magnetic field?
A. The magnetic field increases by a factor of 2.
B. The magnetic field increases by a factor of 4.
C. The magnetic field remains the same.
D. The magnetic field decreases by a factor of 2.
Question 14
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 12 N, what is the angular velocity of the particle?
A. 10 rad/s
B. 20 rad/s
C. 30 rad/s
D. 40 rad/s
Question 15
A 5.0 g sample of a gas at 27°C and 1.0 atm is heated to 127°C at cons\tant volume. What is the final pressure of the gas in atm?
A. 2.0 atm
B. 3.0 atm
C. 4.0 atm
D. 5.0 atm

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