POST UTME CALEB UNIVERSITY 2018 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 2.0 kg block is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. The block is displaced by 0.20 m from its equilibrium position and released from rest. What is the speed of the block when it passes through the equilibrium position?
A. 0.50 m/s
B. 1.0 m/s
C. 1.5 m/s
D. 2.0 m/s
Question 2
A 10 μF capacitor is connected in series with a 20 Ω resistor. If a voltage of 10 V is applied across the circuit, determine the time cons\tant of the circuit.
A. 0.2 s
B. 0.4 s
C. 0.6 s
D. 0.8 s
Question 3
A circuit consists of a 10 Ω resistor, a 20 Ω resistor, and a 30 Ω resistor connected in series. If a voltage of 20 V is applied across the circuit, determine the current flowing through the 20 Ω resistor.
A. 0.5 A
B. 1 A
C. 1.5 A
D. 2 A
Question 4
A parallel plate capacitor has a capaci\tance of 2 μF and is charged to a potential difference of 10 V. If a dielectric slab of thickness 0.5 mm and dielectric cons\tant 3 is inserted between the plates, calculate the new capaci\tance.
A. 2.5 μF
B. 3.5 μF
C. 4.5 μF
D. 5.5 μF
Question 5
A 100 W bulb is connected to a 220 V power source. If the bulb is used for 10 hours a day, what is the total energy consumed by the bulb in a month?
A. 100 kWh
B. 200 kWh
C. 300 kWh
D. 400 kWh
Question 6
A beam of light passes from air into a glass 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 7
A particle of mass 1 kg is moving in a circular path of radius 2 m with a cons\tant speed of 3 m/s. If the particle is subjected to a centripetal force of 6 N, what is the magnitude of the acceleration of the particle?
A. 1 m/s^2
B. 2 m/s^2
C. 3 m/s^2
D. 4 m/s^2
Question 8
A 50 Hz AC generator produces an emf of 200 V. If the generator is connected to a 20 Ω resistor, what is the current flowing through the resistor?
A. 5 A
B. 10 A
C. 20 A
D. 50 A
Question 9
A particle of mass 2 kg is moving in a circular path of radius 3 m with a speed of 4 m/s. What is the centripetal force acting on the particle?
A. 10 N
B. 20 N
C. 30 N
D. 40 N
Question 10
A parallel plate capacitor has a capaci\tance of 10 μF. If a potential difference of 20 V is applied across it, what is the charge stored on each plate?
A. 200 μC
B. 400 μC
C. 600 μC
D. 800 μC
Question 11
A lens of focal length 10 cm is used to form an image of an object placed 20 cm away from the lens. If the object is moved 5 cm closer to the lens, what is the new image dis\tance?
A. 15 cm
B. 20 cm
C. 25 cm
D. 30 cm
Question 12
A magnetic field is produced by a current-carrying wire. If the current is 5 A and the length of the wire is 2 m, what is the magnetic field strength?
A. 0.1 T
B. 0.2 T
C. 0.3 T
D. 0.4 T
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. What is the magnitude of the force acting on the particle?
A. 8 N
B. 12 N
C. 16 N
D. 20 N
Question 14
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 projectile lands 10 m away from the launch point, what is the initial vertical component of the velocity?
A. 5 m/s
B. 10 m/s
C. 15 m/s
D. 20 m/s
Question 15
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 angle between the force and the radius vector at the ins\tant when the particle is at the top of its path?
A. π/2
B. π/3
C. π/4
D. π/6

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