POST UTME LEAD CITY UNIVERSITY 2019 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 10 kg block is moving with a speed of 2 m/s on a horizontal, frictionless surface. If the block is subjected to a cons\tant horizontal force of 5 N, what is the acceleration of the block?
A. 0.5 m/s²
B. 1.0 m/s²
C. 1.5 m/s²
D. 2.0 m/s²
Question 2
A photon of energy $E$ is incident on a metal surface. If the work function of the metal is $\phi$, what is the maximum kinetic energy of the emitted electron?
A. E-\phi
B. E+\phi
C. \frac{E}{\phi}
D. \frac{\phi}{E}
Question 3
A capacitor with a capaci\tance of 10 μF is connected to a 12 V battery. If the capacitor is initially uncharged, calculate the charge on the capacitor after 2 s.
A. 0.1 C
B. 0.2 C
C. 0.3 C
D. 0.4 C
Question 4
A capacitor consists of two parallel plates separated by a dis\tance $d$. If the capaci\tance is $C$ and the charge on the plates is $Q$, what is the electric field between the plates?
A. \frac{Q}{\epsilon_0 A}
B. \frac{Q}{d}
C. \frac{C}{\epsilon_0}
D. \frac{Q}{A}
Question 5
A coil of wire has a resis\tance of $R$ and is connected to a battery of emf $\epsilon$. If the current in the coil is $I$, what is the power dissipated in the coil?
A. RI
B. \frac{RI}{\epsilon}
C. \frac{\epsilon^2}{R}
D. \frac{I^2R}{\epsilon}
Question 6
A 5 kg object is moving in a circular path with a radius of 2 m. If the object has a speed of 4 m/s, what is the magnitude of the net force acting on the object?
A. 10 N
B. 20 N
C. 30 N
D. 40 N
Question 7
A 2 kg block is attached to a horizontal, massless spring with a force cons\tant of 100 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, what is the maximum speed of the block?
A. 0.5 m/s
B. 1.0 m/s
C. 1.5 m/s
D. 2.0 m/s
Question 8
A parallel plate capacitor has a capaci\tance of 10 μF and is charged to a potential difference of 10 V. If the dis\tance between the plates is doubled, what is the new capaci\tance?
A. 5 μF
B. 10 μF
C. 20 μF
D. 25 μF
Question 9
A 100 μC charge is placed at the center of a circular coil of radius 0.1 m. What is the magnetic field at a point on the axis of the coil 0.2 m from the center?
A. 0.01 T
B. 0.02 T
C. 0.03 T
D. 0.04 T
Question 10
A charged particle of mass $m$ and charge $q$ is moving in a circular path of radius $r$ in a uniform magnetic field of strength $B$. If the particle's speed is $v$, what is the magnitude of the magnetic field?
A. \frac{mv}{qr}
B. \frac{qr}{mv}
C. \frac{m^2v^2}{q^2r}
D. \frac{q^2r^2}{m^2v^2}
Question 11
A simple harmonic motion has an amplitude $A$ and a frequency $f$. If the angular frequency is $\omega$, what is the period?
A. \frac{2\pi}{\omega}
B. \frac{\omega}{2\pi}
C. \frac{A}{f}
D. \frac{f}{A}
Question 12
A 20 kg object is at rest on a horizontal, frictionless surface. If a horizontal force of 10 N is applied to the object, what is the work done by the force?
A. 100 J
B. 200 J
C. 300 J
D. 400 J
Question 13
A block of mass 5 kg is susp\ended from a spring with a spring cons\tant of 100 N/m. If the block is displaced by 0.2 m from its equilibrium position and released, what is the maximum speed of the block?
A. 0.5 m/s
B. 1 m/s
C. 1.5 m/s
D. 2 m/s
Question 14
A particle of mass 2 kg is attached to a spring with a spring cons\tant of 100 N/m. The particle is displaced by 0.2 m from its equilibrium position and released from rest. Assuming the motion is simple harmonic, calculate the angular frequency of the particle's motion.
A. 5 rad/s
B. 10 rad/s
C. 15 rad/s
D. 20 rad/s
Question 15
A gas expands from an initial volume of 2 L to a final volume of 5 L at a cons\tant temperature of 300 K. What is the work done by the gas?
A. 150 J
B. 300 J
C. 450 J
D. 600 J

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