POST UTME RHEMA UNIVERSITY 2021 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 100 Hz AC voltage is applied across a capacitor of capaci\tance 10 μF. What is the reac\tance of the capacitor?
A. 10 Ω
B. 100 Ω
C. 1000 Ω
D. 10,000 Ω
Question 2
A 5 μF capacitor is connected in series with a 10 kΩ resistor. What is the time cons\tant of the circuit?
A. 0.05 s
B. 0.5 s
C. 5 s
D. 50 s
Question 3
A 4 kg object is moving in a circular path of radius 5 m with a cons\tant speed of 2 m/s. What is the magnitude of the force acting on the object?
A. 16 N
B. 20 N
C. 24 N
D. 28 N
Question 4
A gas at an initial pressure of 2.0 atm and temperature of 300 K is compressed to a final pressure of 4.0 atm and temperature of 400 K. What is the final volume of the gas?
A. 0.25 m^3
B. 0.50 m^3
C. 0.75 m^3
D. 1.0 m^3
Question 5
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 6
A 10 μF capacitor is connected in parallel with a 5 μF capacitor. What is the equivalent capaci\tance of the circuit?
A. 5 μF
B. 10 μF
C. 15 μF
D. 20 μF
Question 7
A sound wave with a frequency of $f = 200$ Hz is traveling through a medium with a speed of $v = 343$ m/s. What is the wavelength of the sound wave?
A. 1.715 m
B. 1.715 cm
C. 17.15 m
D. 171.5 cm
Question 8
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 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. What is the magnitude of the force acting on the particle?
A. 10 N
B. 12 N
C. 15 N
D. 20 N
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 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 12
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
Question 13
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 14
A capacitor consists of two parallel plates, each of area 0.1 m^2, separated by a dis\tance of 0.01 m. If the capaci\tance is 10 μF, what is the charge on the plates when a potential difference of 5 V is applied?
A. 50 μC
B. 100 μC
C. 150 μC
D. 200 μC
Question 15
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°

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