POST UTME UNIBEN 2020 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A wave has a frequency of 50 Hz and a wavelength of 0.05 m. Calculate the velocity of the wave.
A. 2.5 m/s
B. 5 m/s
C. 10 m/s
D. 25 m/s
Question 2
A body of mass 2 kg is moving with a velocity of 5 m/s. If the force acting on it is 10 N, calculate the acceleration produced.
A. 0.5 m/s^2
B. 1 m/s^2
C. 2 m/s^2
D. 5 m/s^2
Question 3
A body of mass 2 kg is moving with a velocity of 5 m/s. If the force acting on it is 10 N, calculate the acceleration produced.
A. 0.5 m/s^2
B. 1 m/s^2
C. 2 m/s^2
D. 5 m/s^2
Question 4
A 1000 W heater is connected to a 220 V AC supply. If the resis\tance of the heater is 100 Ω, calculate the current flowing through it.
A. 2 A
B. 4 A
C. 5 A
D. 10 A
Question 5
A magnetic field of 0.5 T is applied to a coil of 100 turns and a radius of 0.1 m. If the coil is rotated by 90°, what is the induced emf?
A. 0.5 V
B. 1.0 V
C. 2.0 V
D. 5.0 V
Question 6
A wave has a frequency of 50 Hz and a wavelength of 0.05 m. Calculate the velocity of the wave.
A. 2.5 m/s
B. 5 m/s
C. 10 m/s
D. 25 m/s
Question 7
A ray of light passes through a prism and is re\fracted. If the angle of incidence is 30° and the angle of re\fraction is 20°, calculate the angle of deviation.
A. 10°
B. 20°
C. 30°
D. 40°
Question 8
A wave has a frequency of 20 Hz and a wavelength of 0.5 m. If the wave is traveling in the positive x-direction, what is the direction of the particle velocity?
A. positive x-direction
B. negative x-direction
C. positive y-direction
D. negative y-direction
Question 9
A car is traveling at a speed of 20 m/s. If the driver applies the brakes and the car comes to a stop in 5 s, calculate the acceleration of the car.
A. -2 m/s²
B. -4 m/s²
C. -6 m/s²
D. -8 m/s²
Question 10
A quantum particle is confined to a one-dimensional box. The energy levels are given by the equation E_n = \( n^2 * h^2 \) / \( 8 * m * L^2 \). What is the energy of the particle in the ground state?
A. 10 J
B. 20 J
C. 30 J
D. 40 J
Question 11
A particle of mass 0.5 kg is moving in a circular path with a radius of 2 m. If the particle has a velocity of 4 m/s, calculate the centripetal force acting on the particle.
A. 2 N
B. 4 N
C. 6 N
D. 8 N
Question 12
A particle of mass 2 kg is moving in a circular path of radius 3 m with a cons\tant speed of 4 m/s. If the particle is subjected to a centripetal force of 12 N, what is the magnitude of the acceleration of the particle?
A. 10 m/s^2
B. 12 m/s^2
C. 15 m/s^2
D. 20 m/s^2
Question 13
A gas expands from an initial volume of 2 L to a final volume of 5 L at a cons\tant temperature. What is the work done by the gas?
A. 10 J
B. 20 J
C. 30 J
D. 40 J
Question 14
A magnetic field of 0.5 T is applied to a coil of 100 turns. If the coil has an area of 0.1 m^2, what is the magnetic flux?
A. 0.05 Wb
B. 0.1 Wb
C. 0.15 Wb
D. 0.2 Wb
Question 15
A magnetic field of 0.5 T is applied to a coil of wire with 100 turns. If the coil has a resis\tance of 5 Ω, calculate the induced emf when the current through the coil is 2 A.
A. 0.5 V
B. 1 V
C. 2 V
D. 5 V

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