POST UTME UNIPORT 2019 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 5.0 kg block is moving at a speed of 2.0 m/s on a frictionless surface. What is the block's kinetic energy?
A. 5.0 J
B. 10.0 J
C. 20.0 J
D. 40.0 J
Question 2
A particle of mass 2 kg is moving in a circular path with a cons\tant speed of 4 m/s. If the radius of the path is 3 m, calculate the magnitude of the centripetal acceleration.
A. 12 m/s^2
B. 16 m/s^2
C. 20 m/s^2
D. 24 m/s^2
Question 3
A body of mass 5 kg is moving with a velocity of 10 m/s. If it is subjected to a force of 20 N, calculate the acceleration produced.
A. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2
Question 4
A body of mass 3 kg is moving with a velocity of 15 m/s. If it is subjected to a force of 30 N, what is the change in its kinetic energy?
A. 225 J
B. 300 J
C. 375 J
D. 450 J
Question 5
A capacitor consists of two parallel plates, each of area 0.04 m^2, separated by a dis\tance of 0.02 m. If the plates are charged to a potential difference of 12 V, what is the capaci\tance?
A. 0.02 F
B. 0.04 F
C. 0.06 F
D. 0.08 F
Question 6
A light source is placed 2 m away from a convex lens of focal length 1 m. If the object is moved 1 m closer to the lens, calculate the new image dis\tance.
A. 1 m
B. 2 m
C. 3 m
D. 4 m
Question 7
A projectile is launched at an angle of 60° with an initial velocity of 20 m/s. What is the maximum height reached by the projectile?
A. 10 m
B. 15 m
C. 20 m
D. 25 m
Question 8
A light ray passes from air into 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. 25°
C. 30°
D. 35°
Question 9
A circuit consists of a 10 Ω resistor and a 20 μF capacitor in series. What is the time cons\tant of the circuit?
A. 0.2 s
B. 0.4 s
C. 0.6 s
D. 0.8 s
Question 10
A heat engine operates between a temperature of 500 K and 300 K. If the engine produces 1000 J of work, what is the efficiency?
A. 0.2
B. 0.3
C. 0.4
D. 0.5
Question 11
A particle of mass $m$ is moving in a circular path of radius $r$ with a cons\tant speed $v$. The particle experiences a centripetal force $F_c$ given by $F_c = \frac{mv^2}{r}$. If the particle's speed is doubled to $2v$, what is the new centripetal force $F_{c,new}$?
A. \frac{2mv^2}{r}
B. \frac{4mv^2}{r}
C. \frac{mv^2}{2r}
D. \frac{mv^2}{4r}
Question 12
A light source is placed 2 m away from a convex lens of focal length 0.5 m. If the light source is moved 1 m closer to the lens, calculate the new image dis\tance.
A. 1 m
B. 2 m
C. 3 m
D. 4 m
Question 13
A ray of light 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. 20°
B. 30°
C. 40°
D. 50°
Question 14
A projectile is launched at an angle of 60° with an initial velocity of 20 m/s. If the projectile lands 10 m away from the launch point, what is the initial velocity?
A. 15 m/s
B. 20 m/s
C. 25 m/s
D. 30 m/s
Question 15
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°, calculate the angle of emergence.
A. 20°
B. 30°
C. 45°
D. 60°

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