POST UTME OSUSTECH 2024 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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. 10 m/s^2
B. 12 m/s^2
C. 15 m/s^2
D. 20 m/s^2
Question 2
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 uniform magnetic field of strength $B$ perp\endicular to the plane of the circle, what is the magnitude of the magnetic force acting on the particle?
A. \( \frac{mv^2}{r} \)
B. \( \frac{mv}{r} \)
C. \( \frac{m^2v^2}{r^2} \)
D. \( \frac{mv^2}{r^2} \)
Question 3
A current of 5 A flows through a resistor of resis\tance 10 Ω. If the voltage across the resistor is 20 V, what is the power dissipated by the resistor?
A. 10 W
B. 20 W
C. 30 W
D. 40 W
Question 4
A sound wave with a frequency of 200 Hz has a speed of 340 m/s. What is the wavelength of the sound wave?
A. 1.7 m
B. 1.8 m
C. 1.9 m
D. 2.0 m
Question 5
A capacitor of capaci\tance 5 μF is connected to a battery of voltage 10 V. If the capacitor is initially uncharged, what is the charge on the capacitor after 2 seconds?
A. 0.02 C
B. 0.04 C
C. 0.06 C
D. 0.08 C
Question 6
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. 1 m/s^2
B. 2 m/s^2
C. 3 m/s^2
D. 4 m/s^2
Question 7
A body of mass 5 kg is moving with a velocity of 10 m/s. If the body is subjected to a force of 20 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 8
A photon of energy $E$ is incident on a metal surface. If the work function of the metal is $W$, what is the maximum kinetic energy of the electron emitted?
A. \( E - W \)
B. \( E + W \)
C. \( E \times W \)
D. \( \frac{E}{W} \)
Question 9
A capacitor of capaci\tance 10 μF is charged to a potential difference of 100 V. What is the energy stored in the capacitor?
A. 100 J
B. 500 J
C. 1000 J
D. 2000 J
Question 10
A simple harmonic oscillator has a frequency of $f = 2$ Hz and an amplitude of $A = 3$ m. If the oscillator is displaced from its equilibrium position by $x = 2$ m, what is the magnitude of the force acting on the oscillator?
A. F = 6 N
B. F = 12 N
C. F = 18 N
D. F = 24 N
Question 11
A particle is moving 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. 1.57 rad/s
B. 3.14 rad/s
C. 6.28 rad/s
D. 12.56 rad/s
Question 12
A block of mass 5 kg is moving in a circular path of radius 4 m with a cons\tant speed of 3 m/s. If the block is subjected to a centripetal force of 15 N, what is the magnitude of the acceleration of the block?
A. 1 m/s^2
B. 2 m/s^2
C. 3 m/s^2
D. 4 m/s^2
Question 13
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 14
A parallel plate capacitor consists of two plates of area 0.1 m^2 and separation 0.01 m. If the capacitor is connected to a battery of voltage 12 V, what is the capaci\tance of the capacitor?
A. 0.01 F
B. 0.02 F
C. 0.03 F
D. 0.04 F
Question 15
A 10 Ω resistor is connected in series with a 20 Ω resistor and a 30 Ω resistor. If the total resis\tance is 60 Ω, what is the value of the unknown resistor?
A. 5 Ω
B. 15 Ω
C. 25 Ω
D. 35 Ω

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