POST UTME RHEMA UNIVERSITY 2022 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A light source emits a beam of light with a wavelength of 500 nm. If the beam is incident on a dif\fraction grating with 1000 lines/mm, what is the angle of dif\fraction?
A. 30°
B. 45°
C. 60°
D. 90°
Question 2
A block of mass 5 kg is attached to a spring with a spring cons\tant of 200 N/m. If the block is displaced by 0.2 m from its equilibrium position, calculate the force exerted by the spring on the block.
A. 40 N
B. 60 N
C. 80 N
D. 100 N
Question 3
A particle of mass 2 kg is moving in a circular path of radius 4 m with a cons\tant speed of 6 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. 8 m/s^2
B. 12 m/s^2
C. 16 m/s^2
D. 24 m/s^2
Question 4
A 200 V, 50 Hz AC supply is connected to a 100 Ω resistor. Calculate the rms current flowing through the resistor.
A. 0.5 A
B. 1.0 A
C. 1.5 A
D. 2.0 A
Question 5
A 1.0 kg object is moving with a velocity of 5 m/s. If the object is brought to rest in 2 seconds, what is the resulting force?
A. 2.5
B. 5.0
C. 10.0
D. 20.0
Question 6
A parallel beam of light of wavelength 600 nm is incident on a glass slab of re\fractive index 1.5. If the angle of incidence is 30°, calculate the angle of re\fraction.
A. 20°
B. 30°
C. 40°
D. 50°
Question 7
A thermodynamic system undergoes a process from state A to state B. If the system absorbs 100 J of heat and does 50 J of work, what is the change in internal energy of the system?
A. 50 J
B. 100 J
C. 150 J
D. 200 J
Question 8
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. Calculate the magnitude of the force acting on the particle.
A. 10 N
B. 20 N
C. 30 N
D. 40 N
Question 9
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 experiences a centripetal acceleration of 2 m/s^2, what is the magnitude of the net force acting on it?
A. 8 N
B. 10 N
C. 12 N
D. 16 N
Question 10
A simple harmonic motion has a maximum displacement of 2 m and a period of 4 s. If the amplitude is doubled, what is the new period?
A. 2 s
B. 4 s
C. 8 s
D. 16 s
Question 11
A light ray passes through a prism of angle 60° and is re\fracted at an angle of 30°. If the angle of incidence is 45°, what is the angle of emergence?
A. 30°
B. 45°
C. 60°
D. 90°
Question 12
A particle of mass 2 kg is attached to a spring with a spring cons\tant of 100 N/m. If the particle is displaced by 0.2 m from its equilibrium position and released from rest, determine the maximum velocity of the particle.
A. 0.2 m/s
B. 0.4 m/s
C. 0.6 m/s
D. 0.8 m/s
Question 13
A circuit consists of a 12 V battery, a 4 Ω resistor, and a 2 Ω resistor connected in series. If the current through the 4 Ω resistor is 0.5 A, determine the current through the 2 Ω resistor.
A. 0.25 A
B. 0.5 A
C. 0.75 A
D. 1 A
Question 14
A 0.5 kg object is moving in a circular path with a radius of 0.2 m. If the object has a speed of 2 m/s, what is the resulting centripetal acceleration?
A. 0.1
B. 0.5
C. 1.0
D. 2.0
Question 15
A quantum particle has a wave function given by ψ(x) = Ae^\( -α|x| \). If the probability density is normalized, what is the value of α?
A. 1/m
B. 2/m
C. 3/m
D. 4/m

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