POST UTME CALEB UNIVERSITY 2018 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A uniform magnetic field of strength 0.5 T is applied to a coil of wire with 50 turns and a radius of 0.02 m. If the coil is rotated through an angle of 90° in 0.1 s, calculate the induced emf in the coil.
A. 0.5 V
B. 1.25 V
C. 2.5 V
D. 5 V
Question 2
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. What is the magnitude of the force acting on the particle?
A. 6 N
B. 8 N
C. 10 N
D. 12 N
Question 3
A light ray passes from air into a glass block with a re\fractive index of 1.5. If the angle of incidence is 30°, what is the angle of re\fraction?
A. 18°
B. 20°
C. 22°
D. 25°
Question 4
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 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 sound wave with a frequency of 200 Hz and an amplitude of 0.50 mm is traveling through air at a speed of 343 m/s. What is the wavelength of the sound wave?
A. 1.7 mm
B. 1.7 cm
C. 1.7 m
D. 1.7 km
Question 7
A ray of light passes from air into a glass of re\fractive index 1.5. If the angle of incidence is 30°, calculate the angle of re\fraction.
A. 20°
B. 25°
C. 30°
D. 35°
Question 8
A 5.0 kg block is moving in a circular path with a radius of 2.0 m. If the block has a speed of 4.0 m/s, what is the centripetal force acting on the block?
A. 20 N
B. 40 N
C. 60 N
D. 80 N
Question 9
A block of mass 5 kg is attached to a horizontal, massless spring with a force cons\tant of 200 N/m. The block is displaced by 0.2 m from its equilibrium position and released from rest. Assuming the block undergoes simple harmonic motion, determine the maximum speed of the block as it passes through the equilibrium position.
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s
Question 10
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 11
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 12
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 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 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
Question 14
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 15
A parallel plate capacitor consists of two plates, each of area 0.1 m^2, separated by a dis\tance of 0.01 m. The capaci\tance of the capacitor is 10 nF. If a potential difference of 10 V is applied across the plates, determine the charge stored on each plate.
A. 0.1 C
B. 0.2 C
C. 0.3 C
D. 0.4 C

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