POST UTME WELLSPRING UNIVERSITY 2024 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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. 30°
C. 40°
D. 50°
Question 2
A uniform magnetic field of magnitude 2.0 T is directed along the positive z-axis. A current of 5.0 A flows in a circular loop of radius 0.20 m, placed in the x-y plane. What is the magnitude of the magnetic moment of the loop?
A. 0.10 A\cdot m^2
B. 0.20 A\cdot m^2
C. 0.30 A\cdot m^2
D. 0.40 A\cdot m^2
Question 3
A light ray passes through a prism and is re\fracted. If the angle of incidence is 30° and the angle of re\fraction is 20°, what is the angle of deviation?
A. 40°
B. 50°
C. 60°
D. 70°
Question 4
A parallel plate capacitor has plates of area $A$ and separation $d$. If the capaci\tance is $C$, what is the value of the dielectric cons\tant $K$?
A. \frac{Cd}{\epsilon_0A}
B. \frac{\epsilon_0A}{Cd}
C. \frac{Cd}{\epsilon_0}
D. \frac{\epsilon_0A}{d}
Question 5
A particle of mass 2.0 kg is moving in a circular path of radius 3.0 m with a cons\tant speed of 4.0 m/s. What is the magnitude of the net force acting on the particle?
A. 8.0 N
B. 12.0 N
C. 16.0 N
D. 20.0 N
Question 6
A photon has an energy of 2.5 eV. What is its wavelength?
A. 500 nm
B. 600 nm
C. 700 nm
D. 800 nm
Question 7
A sound wave with a frequency of 200 Hz and a wavelength of 0.5 m is traveling through a medium with a speed of 340 m/s. What is the amplitude of the sound wave?
A. 0.1 m
B. 0.2 m
C. 0.3 m
D. 0.4 m
Question 8
A particle moves in a circular path with a radius of 2 m. If the particle completes one revolution in 4 s, what is its angular velocity?
A. 0.5 rad/s
B. 1 rad/s
C. 2 rad/s
D. 4 rad/s
Question 9
A 10 V battery is connected to a 2 Ω resistor in series with a 4 Ω resistor. What is the current flowing through the 4 Ω resistor?
A. 2.5 A
B. 1.25 A
C. 1.0 A
D. 0.5 A
Question 10
A block of mass 5 kg is attached to a horizontal spring with a force cons\tant of 100 N/m. If 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 11
A particle of mass 0.5 kg is moving in a circular path of radius 2 m with a cons\tant speed of 4 m/s. What is the magnitude of the net force acting on the particle?
A. 2 N
B. 4 N
C. 6 N
D. 8 N
Question 12
A light source is placed 2 m away from a convex lens of focal length 0.5 m. If the image is formed 1 m away from the lens, calculate the magnification.
A. -2
B. -1
C. 1
D. 2
Question 13
A charged particle of mass $m$ and charge $q$ is moving in a uniform magnetic field $B$. The particle has a velocity $v$ perp\endicular to the magnetic field. What is the radius of the circular orbit?
A. \( \frac{mv}{qB} \)
B. \( \frac{m^2v}{q^2B} \)
C. \( \frac{m^2v^2}{q^2B} \)
D. \( \frac{m^2v^2}{qB} \)
Question 14
A radioactive sample decays with a half-life of $T_{1/2}$. What is the activity of the sample after a time $t = 3T_{1/2}$?
A. \( \frac{A_0}{8} \)
B. \( \frac{A_0}{4} \)
C. \( \frac{A_0}{2} \)
D. \( A_0 \)
Question 15
A 5.0 kg block is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. The block is displaced by 2.0 m from its equilibrium position and released from rest. What is the magnitude of the maximum acceleration of the block?
A. 10.0 m/s^2
B. 20.0 m/s^2
C. 30.0 m/s^2
D. 40.0 m/s^2

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