POST UTME COVENANT UNIVERSITY 2019 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A wave has a frequency of 50 Hz and a wavelength of 0.1 m. If the wave is traveling at a speed of 20 m/s, what is the amplitude of the wave?
A. 0.01 m
B. 0.02 m
C. 0.03 m
D. 0.04 m
Question 2
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 acceleration of 2 m/s^2, what is the magnitude of the net force acting on the particle?
A. 8 N
B. 10 N
C. 12 N
D. 16 N
Question 3
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 60° above the horizontal. If the air resis\tance is negligible, what is the maximum height reached by the projectile?
A. 10 m
B. 15 m
C. 20 m
D. 25 m
Question 4
A particle of mass 1 kg is moving in a straight line with an initial velocity of 5 m/s. If the particle is subjected to a force of 10 N, what is the acceleration of the particle?
A. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2
Question 5
A parallel plate capacitor has plates of area 0.04 m^2 and separation 0.02 m. If the capaci\tance is 8.0 µF, what is the charge on the plates when the potential difference between them is 100 V?
A. 0.32 C
B. 0.16 C
C. 0.64 C
D. 0.08 C
Question 6
A gas at a pressure of 2.0 atm and temperature of 300 K is allowed to expand to a volume of 2.0 m^3. What is the final pressure of the gas?
A. 0.5 atm
B. 1.0 atm
C. 1.5 atm
D. 2.0 atm
Question 7
A particle of mass $m$ is moving in a circular path of radius $R$ with a cons\tant speed $v$. If the particle is subjected to a centripetal force $F_c = \frac{mv^2}{R}$, what is the magnitude of the acceleration of the particle?
A. \frac{v^2}{R}
B. \frac{mv^2}{R}
C. \frac{m}{R}
D. \frac{v}{R}
Question 8
A block of mass m is moving with velocity v on a frictionless surface. It collides with a stationary block of mass M. Assuming a perfectly elastic collision, find the velocity of the first block after the collision.
A. v' = \frac{mv}{m + M}
B. v' = \frac{2mv}{m + M}
C. v' = \frac{mv}{m - M}
D. v' = \frac{mv}{m + 2M}
Question 9
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. 6.4 units
B. 7.1 units
C. 7.9 units
D. 8.5 units
Question 10
A light ray 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 11
A convex lens of focal length 20 cm forms an image of an object placed 30 cm in front of it. What is the magnification of the lens?
A. -1/2
B. -1/3
C. -1/4
D. -1/5
Question 12
A capacitor of capaci\tance 10 μF is connected to a battery of voltage 12 V. If the capacitor is initially uncharged, what is the charge on the capacitor after 5 seconds?
A. 0.12 C
B. 0.24 C
C. 0.36 C
D. 0.48 C
Question 13
A radioactive sample has a half-life of 10 years. If the initial activity is 100 Bq, what is the activity after 20 years?
A. 12.5 Bq
B. 25 Bq
C. 37.5 Bq
D. 50 Bq
Question 14
A car is traveling at a speed of 60 km/h. If it accelerates uniformly at 2 m/s^2 for 5 seconds, what is its final velocity?
A. 62 m/s
B. 64 m/s
C. 66 m/s
D. 68 m/s
Question 15
A magnetic field of strength 0.5 T is directed perp\endicular to the plane of a circular loop of radius 0.1 m. What is the magnitude of the magnetic moment of the loop?
A. 0.01 A·m^2
B. 0.02 A·m^2
C. 0.03 A·m^2
D. 0.04 A·m^2

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