POST UTME ACHIEVERS UNIVERSITY 2017 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 240 V, 10 A DC generator has an internal resis\tance of 5 Ω. Calculate the induced emf when it is connected to a 20 Ω load resistor.
A. 250 V
B. 260 V
C. 270 V
D. 280 V
Question 2
A body of mass 2.0 kg is moving in a circular path of radius 1.0 m with a speed of 4.0 m/s. If the body is subjected to a centripetal force of 10 N, calculate the time taken for the body to complete one full rotation.
A. 1.0 s
B. 2.0 s
C. 3.0 s
D. 4.0 s
Question 3
A magnetic field of 0.5 T is directed perp\endicular to a current of 2 A. Calculate the force on a 0.1 m long conductor.
A. 0.1 N
B. 0.2 N
C. 0.3 N
D. 0.4 N
Question 4
A particle of mass 1.0 kg is moving in a straight line with a velocity of 5.0 m/s. If the particle is subjected to a force of 10 N, calculate the acceleration of the particle.
A. 1.0 m/s²
B. 2.0 m/s²
C. 3.0 m/s²
D. 4.0 m/s²
Question 5
A gas is heated from 300 K to 400 K at cons\tant volume. If the initial pressure is 2 atm, what is the final pressure?
A. 2.5 atm
B. 3 atm
C. 4 atm
D. 5 atm
Question 6
A particle of mass 2 kg is moving in a circular path with a cons\tant speed of 4 m/s. If the radius of the path is 3 m, calculate the magnitude of the centripetal acceleration.
A. 4 m/s^2
B. 6 m/s^2
C. 8 m/s^2
D. 10 m/s^2
Question 7
A block of mass 5 kg is attached to a horizontal, massless spring with a force cons\tant of 200 N/m. The block is displaced by 2 m from its equilibrium position and released from rest. What is the maximum speed of the block?
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s
Question 8
A heat engine operates between the temperatures 300 K and 600 K. If the engine absorbs 100 J of heat from the high-temperature reservoir, calculate the work done by the engine.
A. 50 J
B. 75 J
C. 100 J
D. 125 J
Question 9
A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in series. What is the total resis\tance of the circuit?
A. 10 Ω
B. 12 Ω
C. 16 Ω
D. 20 Ω
Question 10
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 11
A capacitor consists of two parallel plates separated by a dis\tance of 2 mm. The capaci\tance of the capacitor is 10 μF. If the potential difference between the plates is increased to 10 V, what is the new charge stored on the capacitor?
A. 100 μC
B. 200 μC
C. 300 μC
D. 400 μC
Question 12
A wave function ψ(x) = A \sin(kx) is given. What is the value of k?
A. 1
B. 2
C. 3
D. 4
Question 13
A 50 Hz, 200 V AC source is connected to a circuit containing a 10 Ω resistor and a 20 μF capacitor in series. Assuming the capacitor is initially uncharged, calculate the maximum value of the current in the circuit.
A. 0.1 A
B. 0.2 A
C. 0.3 A
D. 0.4 A
Question 14
A container holds 2 moles of an ideal gas at a temperature of 300 K. If the gas is heated to 400 K, calculate the change in the internal energy of the gas.
A. 1000 J
B. 2000 J
C. 3000 J
D. 4000 J
Question 15
A magnetic field of 0.5 T is directed perp\endicular to a current of 2 A. If the force on a 0.1 m long wire is 0.2 N, what is the angle between the current and the magnetic field?
A. 30°
B. 45°
C. 60°
D. 75°

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Help others prepare! Share this practice hub: