POST UTME NOUN 2020 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A solid cylindrical block of wood has a radius of 0.05 m and a height of 0.2 m. If the density of the wood is 500 kg/m³, calculate the pressure at the bottom of the block when it is submerged in water.
A. 1000 Pa
B. 2000 Pa
C. 5000 Pa
D. 10000 Pa
Question 2
A 10 μF capacitor is connected in series with a 20 Ω resistor. If a 12 V battery is connected across the circuit, calculate the current flowing through the resistor.
A. 0.6 A
B. 0.8 A
C. 1.0 A
D. 1.2 A
Question 3
A projectile is launched from the ground with an initial velocity of 20.0 m/s at an angle of 30.0° above the horizontal. What is the maximum height reached by the projectile?
A. 5.0 m
B. 10.0 m
C. 15.0 m
D. 20.0 m
Question 4
A 1000 W heating element is connected to a 230 V AC supply. If the power factor is 0.8, calculate the current drawn from the supply.
A. 4.35 A
B. 5.25 A
C. 6.25 A
D. 7.5 A
Question 5
A sound wave has a frequency of 200 Hz and a wavelength of 1.5 m. Calculate the speed of the sound wave.
A. 300 m/s
B. 400 m/s
C. 500 m/s
D. 600 m/s
Question 6
A simple harmonic motion has a frequency of 5 Hz and an amplitude of 2 m. What is the maximum acceleration of the motion?
A. 10 m/s^2
B. 20 m/s^2
C. 30 m/s^2
D. 40 m/s^2
Question 7
A wave has a frequency of 50 Hz and a wavelength of 0.2 m. What is the speed of the wave?
A. 10 m/s
B. 20 m/s
C. 30 m/s
D. 40 m/s
Question 8
A light ray passes through a convex lens and is focused at a dis\tance of 20 cm from the lens. If the object dis\tance is 30 cm, what is the focal length of the lens?
A. 10 cm
B. 20 cm
C. 30 cm
D. 40 cm
Question 9
A 5 kg block is attached to a horizontal spring with a spring cons\tant of 100 N/m. If the block is displaced by 0.2 m from its equilibrium position, calculate the potential energy stored in the spring.
A. 10 J
B. 20 J
C. 30 J
D. 40 J
Question 10
A gas at pressure P1 and volume V1 is heated to a temperature T2. If the final pressure is P2 and the final volume is V2, what is the ratio of the initial and final pressures?
A. P1/P2
B. P2/P1
C. V1/V2
D. V2/V1
Question 11
A body of mass 2 kg is moving with a velocity of 5 m/s. If the force applied to the body is 10 N, calculate the acceleration of the body.
A. 0.5 m/s²
B. 1 m/s²
C. 2 m/s²
D. 5 m/s²
Question 12
A particle of mass m is moving in a circular path of radius r with a cons\tant speed v. What is the magnitude of the centripetal force acting on the particle?
A. mv^2/r
B. mv/r
C. mv^2
D. mv
Question 13
A particle of mass 2 kg is attached to a spring with spring cons\tant 100 N/m. The particle is displaced by 0.5 m from its equilibrium position and released from rest. Assuming the motion is simple harmonic, calculate the time taken for the particle to reach its maximum speed.
A. 0.5 s
B. 1 s
C. 1.5 s
D. 2 s
Question 14
A block of mass 5 kg is placed on a frictionless surface and attached to a horizontal spring with spring cons\tant 200 N/m. The block is displaced by 1 m from its equilibrium position and released from rest. Assuming the motion is simple harmonic, calculate the acceleration of the block at the ins\tant it passes through its equilibrium position.
A. 10 m/s^2
B. 20 m/s^2
C. 30 m/s^2
D. 40 m/s^2
Question 15
A gas is contained in a cylinder of volume 2 m^3 at a pressure of 100 kPa. If the temperature of the gas is increased by 20 K, what is the new pressure of the gas?
A. 120 kPa
B. 140 kPa
C. 160 kPa
D. 180 kPa

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