POST UTME PAN-ATLANTIC UNIVERSITY 2018 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A magnetic field of 0.1 T is applied to a current-carrying wire of length 1 m. If the current in the wire is 2 A, calculate the force exerted on the wire.
A. 0.2 N
B. 0.4 N
C. 0.6 N
D. 0.8 N
Question 2
A block of mass 2 kg is attached to a spring with a spring cons\tant of 100 N/m. If the block is displaced by 0.2 m from its equilibrium position and released, what is the maximum speed of the block?
A. 2.0 m/s
B. 2.5 m/s
C. 3.0 m/s
D. 3.5 m/s
Question 3
A beam of light passes through a convex lens and is focused. If the focal length of the lens is 20 cm and the object dis\tance is 30 cm, what is the image dis\tance?
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
Question 4
A block of mass 5 kg is moving with a velocity of 10 m/s on a frictionless surface. It collides with a stationary block of mass 10 kg. What is the velocity of the combined blocks after the collision?
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s
Question 5
A radioactive sample of Uranium-238 undergoes \alpha decay, emitting an \alpha particle. If the initial mass of the sample is 200 g, and the mass of the \alpha particle is 4 u, what is the mass of the resulting nucleus?
A. 234 u
B. 238 u
C. 242 u
D. 246 u
Question 6
A 100 W light bulb is connected to a 220 V power source. If the resis\tance of the bulb is 100 ohms, what is the current flowing through the bulb?
A. 0.5 A
B. 1 A
C. 2 A
D. 4 A
Question 7
A beam of light is incident on a glass slab at an angle of 30°. If the re\fractive index of the glass is 1.5, calculate the angle of re\fraction.
A. 20°
B. 25°
C. 30°
D. 35°
Question 8
A spring with a spring cons\tant of 100 N/m is stretched by 0.5 m. Calculate the potential energy stored in the spring.
A. 12.5 J
B. 25 J
C. 50 J
D. 100 J
Question 9
A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in series. Calculate the current flowing through the circuit.
A. 1 A
B. 1.5 A
C. 2 A
D. 2.5 A
Question 10
A particle of mass 1 kg is moving in a circular path of radius 0.5 m with a speed of 2 m/s. Calculate the centripetal force acting on the particle.
A. 2 N
B. 4 N
C. 6 N
D. 8 N
Question 11
A sound wave with a frequency of 200 Hz is emitted from a source and reflected off a stationary wall. If the speed of sound in air is 343 m/s, what is the wavelength of the reflected sound wave?
A. 1.7 m
B. 1.9 m
C. 2.1 m
D. 2.3 m
Question 12
A 10 μF capacitor is connected in parallel with a 20 μF capacitor. Calculate the equivalent capaci\tance of the circuit.
A. 10 μF
B. 20 μF
C. 30 μF
D. 40 μF
Question 13
A gas is heated from 20°C to 50°C at cons\tant pressure. Calculate the change in volume.
A. 10 cm³
B. 15 cm³
C. 20 cm³
D. 25 cm³
Question 14
A sound wave has a frequency of 200 Hz and a wavelength of 2 m. Calculate the speed of the sound wave.
A. 400 m/s
B. 500 m/s
C. 600 m/s
D. 700 m/s
Question 15
A 60 Hz AC generator produces a voltage of 120 V. If the current is 10 A, what is the power consumed by the generator?
A. 1200 W
B. 1500 W
C. 1800 W
D. 2000 W

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