POST UTME BOWEN UNIVERSITY 2025 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A body of mass $m$ is moving in a straight line with a velocity $v$. If the body is subjected to a cons\tant force $F$ for a time $t$, what is the resulting change in momentum $\Delta p$?
A. \frac{Ft}{m}
B. \frac{Ft}{mv}
C. \frac{mv}{Ft}
D. \frac{Ft}{mv^2}
Question 2
A block of mass $m$ is placed on a frictionless surface and attached to a horizontal spring with a spring cons\tant $k$. If the block is displaced by a dis\tance $x$ from its equilibrium position and released from rest, what is the resulting simple harmonic motion?
A. \omega = \sqrt{\frac{k}{m}}
B. \omega = \sqrt{\frac{m}{k}}
C. \omega = \sqrt{\frac{k}{m}} \sin\( \omega t \)
D. \omega = \sqrt{\frac{k}{m}} \cos\( \omega t \)
Question 3
A 10 Ω resistor is connected in series with a 20 Ω resistor and a 30 Ω resistor. If a voltage of 12 V is applied across the circuit, what is the current flowing through the circuit?
A. 0.4 A
B. 0.6 A
C. 0.8 A
D. 1 A
Question 4
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 by a dis\tance $x$ from its equilibrium position and released from rest. What is the angular frequency of the resulting simple harmonic motion?
A. \sqrt{\frac{k}{M}}
B. \frac{k}{M}
C. \frac{M}{k}
D. \frac{\sqrt{k}}{\sqrt{M}}
Question 5
A parallel plate capacitor consists of two plates of area $A$ separated by a dis\tance $d$. If a potential difference $V$ is applied across the plates, what is the capaci\tance $C$?
A. \frac{\epsilon_0 A}{d}
B. \frac{\epsilon_0 A}{d^2}
C. \frac{\epsilon_0 d}{A}
D. \frac{\epsilon_0 d^2}{A}
Question 6
A gas is heated from 200 K to 400 K. If the initial volume is 3 L and the final volume is 6 L, calculate the work done by the gas.
A. 150 J
B. 300 J
C. 450 J
D. 600 J
Question 7
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. 4 m/s^2
B. 6 m/s^2
C. 8 m/s^2
D. 10 m/s^2
Question 8
A particle of mass $m$ is moving in a circular path of radius $r$ with a cons\tant speed $v$. The particle is subject to a centripetal force $F_c$ given by $F_c = \frac{mv^2}{r}$. If the particle's speed is doubled to $2v$, what is the new centripetal force $F_{c,new}$?
A. \frac{4mv^2}{r}
B. \frac{2mv^2}{r}
C. \frac{mv^2}{2r}
D. \frac{mv^2}{4r}
Question 9
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 electron emitted?
A. 1.5 eV
B. 2.0 eV
C. 2.5 eV
D. 3.0 eV
Question 10
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 by a dis\tance $x$ from its equilibrium position and released from rest. What is the maximum speed of the block as a function of the displacement $x$?
A. \sqrt{\frac{k}{M}} x
B. \frac{k}{M} x
C. \frac{M}{k} x
D. \frac{\sqrt{k}}{\sqrt{M}} x
Question 11
A particle of mass $m$ is moving in a circular orbit of radius $r$ with a speed $v$. What is the magnitude of the centripetal acceleration?
A. \frac{v^2}{r}
B. \frac{r}{v^2}
C. \frac{v}{r}
D. \frac{r}{v}
Question 12
A particle of mass $m$ is moving in a circular orbit of radius $r$ under the influence of a 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{mv^2}{qr}
C. \frac{mv}{r^2}
D. \frac{mv^2}{r^2}
Question 13
A 100 Ω resistor is connected in series with a 200 Ω resistor and a 50 Ω resistor. What is the total resis\tance?
A. 350 Ω
B. 450 Ω
C. 550 Ω
D. 650 Ω
Question 14
A 5 kg block is moving with a velocity of 10 m/s. What is its momentum?
A. 50 kg m/s
B. 60 kg m/s
C. 70 kg m/s
D. 80 kg m/s
Question 15
A beam of light is incident on a glass slab at an angle of 45°. If the re\fractive index of the glass is 1.8, calculate the angle of re\fraction.
A. 25°
B. 30°
C. 35°
D. 40°

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