POST UTME RHEMA UNIVERSITY 2021 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 2.5 kg block is susp\ended from a spring with a force cons\tant of 200 N/m. If the block is displaced by 0.15 m from its equilibrium position, what is the magnitude of the force exerted by the spring on the block?
A. 30 N
B. 40 N
C. 50 N
D. 60 N
Question 2
A 100 W light bulb is connected to a 230 V AC power source. What is the current drawn by the bulb?
A. 0.4 A
B. 0.6 A
C. 0.8 A
D. 1.0 A
Question 3
A light ray passes through a prism of angle 30° and is re\fracted at an angle of 20°. What is the angle of deviation?
A. 10°
B. 20°
C. 30°
D. 40°
Question 4
A gas is enclosed in a vessel of volume 5.0 L at a temperature of 300 K. If the temperature is increased to 400 K, what is the new volume of the gas, assuming ideal gas behavior?
A. 6.25 L
B. 7.5 L
C. 8.33 L
D. 9.0 L
Question 5
A 5 kg block is moving up a 30° incline with a cons\tant speed of 2 m/s. What is the work done by the force of gravity?
A. -50 J
B. -60 J
C. -70 J
D. -80 J
Question 6
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. What is the magnitude of the force acting on the particle?
A. 10 N
B. 20 N
C. 30 N
D. 40 N
Question 7
A wave function is given by ψ(x) = Ae^\( -αx^2 \). If the wave function is normalized, what is the value of the cons\tant A?
A. 1/√(2α)
B. 1/√(α)
C. √(α)
D. α
Question 8
A block of mass 5 kg is attached to a horizontal spring with a force 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 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s
Question 9
A particle of mass $m$ is moving in a circular path with a radius of $r$. The particle is subject to a centripetal force given by $F_c = \frac{mv^2}{r}$. What is the acceleration of the particle?
A. \frac{v^2}{r}
B. \frac{mv^2}{r}
C. \frac{m}{r}
D. \frac{r}{m}
Question 10
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. What is the magnitude of the force acting on the particle?
A. 12 N
B. 16 N
C. 20 N
D. 24 N
Question 11
A wave with a frequency of $f = 10$ Hz is traveling through a medium with a speed of $v = 20$ m/s. What is the period of the wave?
A. 0.1 s
B. 1 s
C. 10 s
D. 100 s
Question 12
A 10 μF capacitor is connected in series with a 20 Ω resistor and a 50 V battery. What is the current flowing through the circuit?
A. 0.25 A
B. 0.50 A
C. 0.75 A
D. 1.0 A
Question 13
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 30° above the horizontal. If the acceleration due to gravity is 9.8 m/s^2, what is the maximum height reached by the projectile?
A. 15 m
B. 20 m
C. 25 m
D. 30 m
Question 14
A light ray passes from air into a glass slab of re\fractive index 1.5. If the angle of incidence is 30°, what is the angle of re\fraction?
A. 20°
B. 30°
C. 40°
D. 50°
Question 15
A vector A has a magnitude of 5 units and makes an angle of 30° with the positive x-axis. If a vector B has a magnitude of 3 units and makes an angle of 60° with the positive x-axis, what is the magnitude of the resul\tant vector A + B?
A. 4 units
B. 5 units
C. 6 units
D. 7 units

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