POST UTME DELSU 2023 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 subjected to a centripetal force of 12 N, what is the angle between the force and the radius vector at the ins\tant when the particle is at the top of its path?
A. 90°
B. 45°
C. 60°
D. 30°
Question 2
A gas is enclosed in a container with a movable piston. The gas is heated, cau\sing its pressure to increase. Which of the following statements is true about the gas?
A. The gas expands to fill the container.
B. The gas contracts to occupy less space.
C. The gas remains at cons\tant pressure.
D. The gas undergoes a phase transition.
Question 3
A magnetic field is produced by a current-carrying wire. The magnetic field lines are directed perp\endicular to the wire and form concentric circles around it. What is the direction of the magnetic field at point P, which is located at a dis\tance $r$ from the wire?
A. towards the wire
B. away from the wire
C. perp\endicular to the wire
D. in the direction of the current
Question 4
A capacitor consists of two parallel plates, each with a surface area of 0.01 m^2. The dis\tance between the plates is 0.001 m. If the capaci\tance is 10 nF, what is the electric field between the plates?
A. 100 V/m
B. 200 V/m
C. 300 V/m
D. 400 V/m
Question 5
A 100 W light bulb is connected to a 220 V power source. What is the current flowing through the bulb?
A. 0.4 A
B. 0.5 A
C. 0.6 A
D. 0.7 A
Question 6
A particle of mass 2 kg is moving in a circular path with a radius of 3 m. If the particle has a speed of 4 m/s, what is the magnitude of the centripetal force acting on it?
A. 8 N
B. 16 N
C. 24 N
D. 32 N
Question 7
A capacitor consists of two parallel plates, each with a surface area of 0.01 m^2. The dis\tance between the plates is 0.001 m. If the capaci\tance is 10 nF, what is the energy stored in the capacitor when it is charged to a potential difference of 10 V?
A. 0.1 J
B. 0.2 J
C. 0.3 J
D. 0.4 J
Question 8
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 30° above the horizontal. What is the maximum height reached by the projectile?
A. 10 m
B. 15 m
C. 20 m
D. 25 m
Question 9
A wave with a frequency of 50 Hz and a wavelength of 2 m is traveling through a medium. If the wave has a speed of 100 m/s, what is the amplitude of the wave?
A. 0.1 m
B. 0.2 m
C. 0.3 m
D. 0.4 m
Question 10
A capacitor has a capaci\tance of 2 x 10^-6 F and is charged to a potential difference of 100 V. What is the energy stored in the capacitor?
A. 0.02 J
B. 0.04 J
C. 0.06 J
D. 0.08 J
Question 11
A circuit consists of a battery, a resistor, and a switch. The switch is closed, cau\sing the circuit to be complete. Which of the following statements is true about the circuit?
A. The circuit is in a state of equilibrium.
B. The circuit is in a state of non-equilibrium.
C. The circuit is in a state of steady-state.
D. The circuit is in a state of transient.
Question 12
A capacitor consists of two parallel plates separated by a dis\tance $d$. The capaci\tance is given by $C = \frac{\epsilon_0 A}{d}$. What is the capaci\tance of a capacitor with plates of area $A$ and separation $d$?
A. \frac{\epsilon_0 A}{d}
B. \frac{\epsilon_0 d}{A}
C. \frac{A}{\epsilon_0 d}
D. \frac{d}{\epsilon_0 A}
Question 13
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 $omega$ in terms of $k$ and $m$.
A. \omega = \frac{k}{m}
B. \omega = \sqrt{\frac{m}{k}}
C. \omega = \frac{m}{k}
D. \omega = \sqrt{\frac{k}{m}}
Question 14
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/s²
B. 4 m/s²
C. 6 m/s²
D. 8 m/s²
Question 15
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. What is the magnitude of the force acting on the particle?
A. 8 N
B. 12 N
C. 16 N
D. 20 N

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