POST UTME MADONNA UNIVERSITY 2023 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A thermodynamic system undergoes a process from state A to state B. If the system's internal energy increases by 100 J and the work done on the system is 50 J, what is the change in the system's enthalpy?
A. 150 J
B. 200 J
C. 250 J
D. 300 J
Question 2
A circuit consists of a 10 Ω resistor, a 20 Ω resistor, and a 5 Ω resistor connected in series. If the voltage source is 12 V, what is the current in the circuit?
A. 0.40 A
B. 0.50 A
C. 0.60 A
D. 0.80 A
Question 3
A 50 Hz AC source is connected to a 10 Ω resistor. If the rms voltage is 100 V, what is the power consumed by the resistor?
A. 1000 W
B. 2000 W
C. 3000 W
D. 4000 W
Question 4
A particle of mass 2 kg is attached to a spring with a spring cons\tant of 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. 5 rad/s
B. 10 rad/s
C. 20 rad/s
D. 50 rad/s
Question 5
A body of mass 5 kg is moving with a velocity of 10 m/s. If the force acting on it is 20 N, what is the acceleration?
A. 0.5 m/s^2
B. 1.0 m/s^2
C. 2.0 m/s^2
D. 5.0 m/s^2
Question 6
A heat engine operates between a high-temperature reservoir at 500 K and a low-temperature reservoir at 300 K. If the efficiency of the engine is 30%, what is the maximum possible work output?
A. 100 J
B. 200 J
C. 300 J
D. 400 J
Question 7
A uniform magnetic field of strength 2.0 T is applied to a current-carrying wire of length 0.5 m. If the current in the wire is 5.0 A, what is the magnitude of the magnetic force experienced by the wire?
A. 0.25 N
B. 0.50 N
C. 1.00 N
D. 2.00 N
Question 8
A gas is enclosed in a container with a movable piston. The gas is heated, cau\sing its pressure to increase. If the piston is allowed to move freely, what will happen to the volume of the gas?
A. The volume will decrease
B. The volume will increase
C. The volume will remain cons\tant
D. The volume will increase and then decrease
Question 9
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 60° above the horizontal. What is the maximum height reached by the projectile?
A. 10 m
B. 15 m
C. 20 m
D. 25 m
Question 10
A parallel plate capacitor has a capaci\tance of 10 μF and is charged to a potential difference of 100 V. Calculate the energy stored in the capacitor.
A. 0.5 J
B. 1 J
C. 5 J
D. 10 J
Question 11
A parallel plate capacitor has a capaci\tance of 10 μF. If a potential difference of 20 V is applied across it, what is the charge stored on each plate?
A. 200 μC
B. 400 μC
C. 600 μC
D. 800 μC
Question 12
A vector \vec{A} has a magnitude of 5.0 units and makes an angle of 30° with the positive x-axis. What is the x-component of \vec{A}?
A. 2.5 units
B. 3.0 units
C. 4.0 units
D. 5.0 units
Question 13
A block of mass 5 kg is placed on a frictionless surface and attached to a horizontal spring with a spring cons\tant of 200 N/m. The block is displaced by 0.1 m from its equilibrium position and released from rest. Assuming the motion is simple harmonic, calculate the force exerted on the block by the spring at the ins\tant when the block is 0.05 m from its equilibrium position.
A. 10 N
B. 20 N
C. 50 N
D. 100 N
Question 14
A gas is heated from 300 K to 400 K at cons\tant volume. If the initial pressure is 1.0 atm, what is the final pressure?
A. 1.33 atm
B. 2.00 atm
C. 2.67 atm
D. 3.33 atm
Question 15
A particle of mass 2 kg is moving in a circular path with a radius of 3 m. If the particle's angular momentum is 10 kg m^2/s, what is its linear momentum?
A. 20 kg m/s
B. 30 kg m/s
C. 40 kg m/s
D. 50 kg m/s

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