POST UTME MOUNTAIN TOP UNIVERSITY 2017 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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 force acting on the particle?
A. 10 N
B. 20 N
C. 30 N
D. 40 N
Question 2
A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in series. What is the total resis\tance of the circuit?
A. 8 Ω
B. 10 Ω
C. 12 Ω
D. 16 Ω
Question 3
A radioactive subs\tance has a half-life of 10 years. If 100 g of the subs\tance is present initially, how much of the subs\tance will remain after 20 years?
A. 25 g
B. 50 g
C. 75 g
D. 100 g
Question 4
A radioactive sample of Uranium-238 undergoes \alpha decay, emitting an \alpha particle. If the mass number of the daughter nucleus is 234, what is the mass number of the \alpha particle?
A. 4
B. 6
C. 8
D. 10
Question 5
A force $F$ is applied to a particle of mass $m$ at an angle $\theta$ to the horizontal. If the particle is moving in a circular path of radius $r$, what is the magnitude of the acceleration of the particle?
A. \frac{F}{m} \sin \theta
B. \frac{F}{m} \cos \theta
C. \frac{F}{m} \sin \theta
D. \frac{F}{m} \cos \theta
Question 6
A charged particle of mass 1 kg and charge 2 C is moving in a magnetic field of strength 5 T. If the particle is moving with a speed of 10 m/s, what is the magnitude of the force acting on the particle?
A. 10 N
B. 20 N
C. 30 N
D. 40 N
Question 7
A wave has a frequency of 50 Hz and a wavelength of 0.2 m. What is the speed of the wave?
A. 10 m/s
B. 20 m/s
C. 30 m/s
D. 40 m/s
Question 8
A beam of light 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 9
A block of mass 5 kg is placed on a frictionless surface and a horizontal force of 10 N is applied to it. What is the acceleration of the block?
A. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2
Question 10
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. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2
Question 11
A particle of mass $m$ is moving in a circular path of radius $r$ with a cons\tant speed $v$. What is the magnitude of the acceleration of the particle?
A. \frac{v^2}{r}
B. \frac{v}{r}
C. \frac{r}{v}
D. \frac{v}{r^2}
Question 12
A body of mass 5 kg is moving with a speed of 20 m/s. If the body is subjected to a force of 50 N, what is the acceleration of the body?
A. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2
Question 13
A photon of wavelength 500 nm is incident on a metal surface. If the work function of the metal is 2.5 eV, what is the maximum kinetic energy of the emitted electron?
A. 1.25 eV
B. 2.5 eV
C. 3.75 eV
D. 5 eV
Question 14
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. 10 m/s^2
B. 12 m/s^2
C. 15 m/s^2
D. 20 m/s^2
Question 15
A simple harmonic motion has a frequency of 2.0 Hz and an amplitude of 3.0 m. What is the maximum acceleration of the particle?
A. 6.0 m/s^2
B. 12 m/s^2
C. 18 m/s^2
D. 24 m/s^2

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