POST UTME UNIBEN 2021 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A body of mass 5 kg is moving with a velocity of 10 m/s. Calculate the work done by a force of 20 N acting on the body.
A. 100 J
B. 200 J
C. 300 J
D. 400 J
Question 2
A 2.0 kg object is moving with a cons\tant velocity of 3.0 m/s. If the object is subjected to a force of 10 N, determine the acceleration of the object.
A. 1.0 m/s^2
B. 2.0 m/s^2
C. 3.0 m/s^2
D. 4.0 m/s^2
Question 3
A particle of mass $m$ is attached to a spring with spring cons\tant $k$. The particle is displaced from its equilibrium position by a dis\tance $x_0$ and released from rest. Assuming the motion is simple harmonic, find the angular frequency of the particle's motion.
A. \sqrt{\frac{k}{m}}
B. \frac{k}{m}
C. \frac{m}{k}
D. \frac{1}{\sqrt{mk}}
Question 4
A 3.0 kg block is attached to a horizontal, massless spring with a force cons\tant of 200 N/m. The block is displaced by 0.2 m from its equilibrium position and released from rest. Assuming the block undergoes simple harmonic motion, determine the maximum speed of the block as it passes through the equilibrium position.
A. 2.0 m/s
B. 4.0 m/s
C. 6.0 m/s
D. 8.0 m/s
Question 5
A wave has a frequency of 100 Hz and a wavelength of 0.1 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 6
A parallel plate capacitor has plates of area 0.04 m^2 and separation 0.02 m. If a potential difference of 10 V is applied across the plates, calculate the capaci\tance.
A. 0.02 F
B. 0.01 F
C. 0.005 F
D. 0.001 F
Question 7
A body of mass 5 kg is moving with a velocity of 10 m/s. If it 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 block of mass $m$ is placed on a frictionless surface and attached to a horizontal spring with spring cons\tant $k$. The block is displaced from its equilibrium position by a dis\tance $x_0$ and released from rest. Assuming the motion is simple harmonic, find the kinetic energy of the block at time $t$.
A. \frac{1}{2}kx^2
B. \frac{1}{2}kx
C. \frac{1}{2}mx^2
D. \frac{1}{2}mx
Question 9
A gas is heated from 300 K to 400 K at cons\tant volume. If the initial pressure is 1 atm, calculate the final pressure.
A. 1.33 atm
B. 1.5 atm
C. 1.67 atm
D. 2 atm
Question 10
A body of mass 5 kg is moving with a velocity of 10 m/s. If it is subjected to a force of 20 N, calculate the acceleration.
A. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2
Question 11
A capacitor is connected to a battery of 12 V. If the capacitor's capaci\tance is 10 μF, what is the charge stored?
A. 120 μC
B. 150 μC
C. 180 μC
D. 200 μC
Question 12
A 2.0 kg object is moving with a cons\tant velocity of 3.0 m/s. If the object is subjected to a force of 10 N, determine the acceleration of the object.
A. 1.0 m/s^2
B. 2.0 m/s^2
C. 3.0 m/s^2
D. 4.0 m/s^2
Question 13
A 1.0 kg object is moving in a circular path with a cons\tant speed of 4.0 m/s. If the radius of the path is 2.0 m, determine the centripetal acceleration of the object.
A. 2.0 m/s^2
B. 4.0 m/s^2
C. 6.0 m/s^2
D. 8.0 m/s^2
Question 14
A particle of mass $m$ is moving in a circular orbit of radius $R$ under the influence of a central force given by $F(r) = -k/r^2$. If the particle's speed is $v$, what is the angular momentum of the particle?
A. $m v R$
B. $\frac{m v R}{k}$
C. $\frac{k}{m v R}$
D. $\frac{m v R}{k^2}$
Question 15
A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in series. If the current in the circuit is 2 A, determine the potential difference across the 6 Ω resistor u\sing Ohm's Law.
A. 8 V
B. 10 V
C. 12 V
D. 14 V

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