POST UTME AAUA 2020 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 5 kg block is moving in a straight line with a velocity of 10 m/s. What is the kinetic energy of the block?
A. 25 J
B. 50 J
C. 75 J
D. 100 J
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 force of 12 N, what is the magnitude of the acceleration of the particle?
A. 4 m/s^2
B. 6 m/s^2
C. 8 m/s^2
D. 10 m/s^2
Question 3
A capacitor has a capaci\tance of 10 μF and is charged to a potential difference of 12 V. What is the energy stored in the capacitor?
A. 0.72 J
B. 1.44 J
C. 2.88 J
D. 5.76 J
Question 4
A beam of light is incident on a prism at an angle of 30°. If the re\fractive index of the prism is 1.5, what is the angle of re\fraction?
A. 20°
B. 30°
C. 40°
D. 50°
Question 5
A radioactive sample decays from 100 Bq to 50 Bq in 10 minutes. Calculate the half-life of the sample.
A. 5 min
B. 10 min
C. 15 min
D. 20 min
Question 6
A particle of mass $m$ is moving in a circular orbit of radius $r$ with a speed $v$. If the particle is subjected to a uniform magnetic field of strength $B$, what is the radius of the new orbit when the particle's speed is doubled?
A. \frac{mv}{2qB}
B. \frac{2mv}{qB}
C. \frac{mv}{qB}
D. \frac{4mv}{qB}
Question 7
A parallel plate capacitor has plates of area 0.04 m^2 and separation 0.02 m. If the dielectric cons\tant of the material between the plates is 3.2, calculate the capaci\tance.
A. 1.6 x 10^-9 F
B. 3.2 x 10^-9 F
C. 6.4 x 10^-9 F
D. 12.8 x 10^-9 F
Question 8
A particle of mass 3 kg is moving in a circular path of radius 2 m with a cons\tant speed of 5 m/s. If the particle is subjected to a centripetal force of 15 N, what is the magnitude of 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 9
A beam of light passes through a convex lens of focal length 20 cm. If the object dis\tance is 30 cm, calculate the image dis\tance.
A. 10 cm
B. 20 cm
C. 30 cm
D. 40 cm
Question 10
A beam of light 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 11
A circuit consists of a 10 Ω resistor, a 20 Ω resistor, and a 5 Ω resistor connected in series. If a voltage of 12 V is applied across the circuit, what is the current flowing through the 5 Ω resistor?
A. 0.4 A
B. 0.6 A
C. 0.8 A
D. 1 A
Question 12
A particle of mass 2 kg is attached to a spring with a spring cons\tant of 100 N/m. If the particle is displaced by 0.2 m from its equilibrium position and released from rest, what is the maximum velocity of the particle?
A. 0.2 m/s
B. 0.4 m/s
C. 0.6 m/s
D. 0.8 m/s
Question 13
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 2 m from its equilibrium position and released from rest. What is the maximum speed of the block?
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s
Question 14
A particle of mass $m$ is moving in a circular orbit of radius $r$ with a speed $v$. If the particle is subjected to a uniform magnetic field of strength $B$, what is the radius of the new orbit when the particle's speed is doubled?
A. \frac{mv}{2qB}
B. \frac{2mv}{qB}
C. \frac{mv}{qB}
D. \frac{4mv}{qB}
Question 15
A particle of mass $m$ is moving in a simple harmonic motion with a frequency $\omega$. If the particle is subjected to a force $F = -kx$, what is the equation of motion?
A. x(t) = A \sin\( \omega t + \phi \)
B. x(t) = A \cos\( \omega t + \phi \)
C. x(t) = A \sin\( \omega t - \phi \)
D. x(t) = A \cos\( \omega t - \phi \)

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Help others prepare! Share this practice hub: