POST UTME MADONNA UNIVERSITY 2024 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. Calculate the speed of the wave.
A. 5 m/s
B. 10 m/s
C. 20 m/s
D. 50 m/s
Question 2
A photon of energy 2 eV is incident on a metal surface with work function 1 eV. What is the maximum kinetic energy of the emitted electron?
A. 0.5 eV
B. 1 eV
C. 1.5 eV
D. 2 eV
Question 3
A magnetic field of 0.5 T is applied to a coil of wire with 100 turns. The coil has a radius of 0.1 m. Calculate the magnetic flux through the coil.
A. 0.01 Wb
B. 0.02 Wb
C. 0.03 Wb
D. 0.04 Wb
Question 4
A photon of energy 2 eV is incident on a metal surface with work function 1 eV. Calculate the kinetic energy of the emitted electron.
A. 0.5 eV
B. 1 eV
C. 1.5 eV
D. 2 eV
Question 5
A lens with focal length 0.2 m is used to form an image of an object at a dis\tance of 0.5 m. What is the magnification of the lens?
A. -2.0
B. -1.0
C. 1.0
D. 2.0
Question 6
A block of wood with a density of 500 kg/m³ is submerged in water. Calculate the buoyant force acting on the block.
A. 200 N
B. 300 N
C. 400 N
D. 500 N
Question 7
A particle of mass 3 kg is moving in a circular path of radius 4 m with a cons\tant speed of 6 m/s. If the particle is subject to a centripetal force of 18 N, what is the magnitude of the acceleration of the particle?
A. 4 m/s^2
B. 8 m/s^2
C. 18 m/s^2
D. 36 m/s^2
Question 8
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 subject to a centripetal force of 12 N, what is the magnitude of the acceleration of the particle?
A. 4 m/s^2
B. 8 m/s^2
C. 16 m/s^2
D. 32 m/s^2
Question 9
A radioactive sample has a half-life of 2 years. If the initial activity is 100 Bq, calculate the activity after 4 years.
A. 12.5 Bq
B. 25 Bq
C. 50 Bq
D. 100 Bq
Question 10
A charged particle of mass $m$ and charge $q$ is moving in a magnetic field of strength $B$ with a velocity $v$. The particle experiences a magnetic force $F_B=qvB$. If the particle's mass is $0.01\text{ kg}$, the charge is $0.001\text{ C}$, the velocity is $5\text{ m/s}$, and the magnetic field strength is $0.1\text{ T}$, calculate the magnetic force.
A. 0.00005 N
B. 0.0001 N
C. 0.0005 N
D. 0.001 N
Question 11
A gas expands from 1 L to 2 L against a cons\tant external pressure of 2 atm. Calculate the work done by the gas.
A. 100 J
B. 200 J
C. 300 J
D. 400 J
Question 12
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 acceleration due to gravity is 9.8 m/s^2, calculate the maximum height reached by the projectile.
A. 10 m
B. 12 m
C. 15.5 m
D. 18 m
Question 13
A charged particle moves in a circular path in a uniform magnetic field. If the radius of the path is 0.5 m and the magnetic field strength is 0.2 T, what is the charge of the particle?
A. 1.0 x 10^-6 C
B. 2.0 x 10^-6 C
C. 3.0 x 10^-6 C
D. 4.0 x 10^-6 C
Question 14
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. 30°
C. 40°
D. 50°
Question 15
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 $F_c=\frac{mv^2}{r}$. If the particle's speed is $5\text{ m/s}$ and the radius of the path is $2\text{ m}$, calculate the centripetal force.
A. 0.25 N
B. 0.5 N
C. 1 N
D. 2 N

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