POST UTME LAUTECH 2017 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A \sinusoidal voltage of 20 V is applied across a 10 Ω resistor. If the frequency of the voltage is 50 Hz, what is the rms value of the current flowing through the resistor?
A. 0.2 A
B. 0.4 A
C. 0.6 A
D. 0.8 A
Question 2
A 50 kg person is s\tanding on a scale that reads 500 N. If the person is then placed in a lift that accelerates downward at 2 m/s², what is the new reading on the scale?
A. 450 N
B. 400 N
C. 350 N
D. 300 N
Question 3
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 4
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 5
A radioactive subs\tance decays at a rate of 0.05% per hour. If the initial amount of the subs\tance is 100 g, calculate the amount remaining after 5 hours.
A. 90 g
B. 95 g
C. 98 g
D. 99 g
Question 6
A 20 kg block is moving with a speed of 10 m/s. If the block is subject to a force of 50 N, what is the acceleration of the block?
A. 1 m/s^2
B. 2 m/s^2
C. 3 m/s^2
D. 4 m/s^2
Question 7
A 12 V battery is connected to a 4 Ω resistor in series with a 6 Ω resistor. What is the current flowing through the circuit?
A. 1 A
B. 2 A
C. 3 A
D. 4 A
Question 8
A gas occupies a volume of 2 L at a pressure of 1 atm and a temperature of 300 K. If the pressure is increased to 2 atm and the temperature is decreased to 200 K, what is the new volume of the gas?
A. 1 L
B. 2 L
C. 4 L
D. 8 L
Question 9
A block of mass 5 kg is placed on a frictionless surface and attached to a horizontal spring with a force cons\tant of 20 N/m. If 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 10
A body of mass 5 kg is moving in a straight line with an initial velocity of 10 m/s. If it experiences a force of 20 N, what is the acceleration of the body?
A. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2
Question 11
A particle of mass 2 kg is projected from the origin with an initial velocity of 10 m/s at an angle of 60° to the horizontal. Find the time of flight.
A. 2 s
B. 3 s
C. 4 s
D. 5 s
Question 12
A wave has a frequency of 20 Hz and a wavelength of 0.1 m. If the wave is traveling in a medium with a speed of 400 m/s, what is the amplitude of the wave?
A. 0.01 m
B. 0.1 m
C. 1 m
D. 10 m
Question 13
A 1000 Hz sound wave is traveling through a medium with a speed of 343 m/s. If the wavelength of the sound wave is 0.34 m, what is the frequency of the sound wave?
A. 2000 Hz
B. 2500 Hz
C. 3000 Hz
D. 4000 Hz
Question 14
A circuit consists of a 12 V battery, a 4 Ω resistor, and an inductor of 2 H in series. If the current in the circuit is 2 A, what is the voltage drop across the inductor?
A. 8 V
B. 12 V
C. 4 V
D. 6 V
Question 15
A body cools from 80°C to 60°C in 5 minutes. If the temperature of the surroundings is 20°C, calculate the time taken for the body to cool from 60°C to 40°C.
A. 10 minutes
B. 15 minutes
C. 20 minutes
D. 25 minutes

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