POST UTME OSUSTECH 2017 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 100 W bulb is connected to a 200 V AC supply. If the power factor is 0.8, what is the current drawn by the bulb?
A. 0.5 A
B. 1.0 A
C. 2.0 A
D. 5.0 A
Question 2
A capacitor is connected to a 12 V battery. If the capaci\tance is 0.02 F, what is the charge stored?
A. 0.2 C
B. 0.4 C
C. 0.6 C
D. 0.8 C
Question 3
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. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2
Question 4
A particle of mass 0.5 kg is attached to a spring with a spring cons\tant of 100 N/m. If the particle is displaced by 0.2 m from its equilibrium position and released from rest, what is its angular frequency?
A. 1.0 rad/s
B. 2.0 rad/s
C. 5.0 rad/s
D. 10.0 rad/s
Question 5
A circuit consists of a resistor $R_1$ and an inductor $L$ connected in series. The circuit is driven by a voltage source $V(t) = V_0 \sin omega t$. The impedance $Z$ of the circuit is given by $Z = \sqrt{R_1^2 + (L omega)^2}$. If the resis\tance $R_1$ is doubled to $2R_1$, what is the new impedance $Z_{new}$?
A. \sqrt{\( 2R_1 \)^2 + (L omega)^2}
B. \sqrt{R_1^2 + (L omega)^2}
C. \sqrt{\( 2R_1 \)^2 + (2L omega)^2}
D. \sqrt{R_1^2 + (2L omega)^2}
Question 6
A wave with a frequency of 50 Hz and a wavelength of 2 m is traveling through a medium. What is the speed of the wave?
A. 100 m/s
B. 200 m/s
C. 300 m/s
D. 400 m/s
Question 7
A wave has a frequency of 50 Hz and a wavelength of 0.2 m. If the wave is traveling in the positive x-direction, what is the direction of the group velocity?
A. Positive x-direction
B. Negative x-direction
C. No change in direction
D. Dep\ends on the amplitude
Question 8
A capacitor of 10 μF is connected in series with a resistor of 100 Ω. If the voltage across the capacitor is 5 V, what is the current through the resistor?
A. 0.05 A
B. 0.1 A
C. 0.2 A
D. 0.5 A
Question 9
A gas is compressed adiabatically from an initial volume of 2 m^3 to a final volume of 1 m^3. If the initial temperature is 300 K, what is the final temperature?
A. 400 K
B. 500 K
C. 600 K
D. 700 K
Question 10
A projectile is launched at an angle of 60° above the horizontal with an initial velocity of 20 m/s. If the air resis\tance is negligible, what is the maximum height reached by the projectile?
A. 10 m
B. 15 m
C. 20 m
D. 25 m
Question 11
A beam of light passes from air into a glass of re\fractive index 1.5. If the angle of incidence is 30°, what is the angle of re\fraction?
A. 20°
B. 30°
C. 40°
D. 50°
Question 12
A magnetic field of 0.5 T is applied to a current-carrying wire of length 2 m. If the current is 5 A, what is the magnitude of the force on the wire?
A. 0.5 N
B. 1 N
C. 2 N
D. 5 N
Question 13
A particle of mass 0.2 kg is moving in a circular path with a radius of 0.5 m. If the particle has a speed of 2 m/s, what is its centripetal acceleration?
A. 1.0 m/s^2
B. 2.0 m/s^2
C. 5.0 m/s^2
D. 10.0 m/s^2
Question 14
A gas is enclosed in a container at a temperature of 300 K. The pressure of the gas is 1.5 atm. If the temperature is increased to 400 K, what is the new pressure of the gas?
A. 2.0 atm
B. 1.5 atm
C. 3.0 atm
D. 4.0 atm
Question 15
A charged particle of mass $m$ and charge $q$ is moving in a magnetic field $B$ with a velocity $v$. The particle experiences a force $F$ given by $F = qvB$. If the magnetic field is doubled to $2B$, what is the new force $F_{new}$?
A. 2qvB
B. qvB
C. \frac{1}{2}qvB
D. \frac{1}{4}qvB

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