POST UTME ABU 2017 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A gas is contained in a cylinder of volume 2 m^3 at a pressure of 100 kPa. If the temperature of the gas is increased by 20 K, what is the new pressure of the gas?
A. 120 kPa
B. 140 kPa
C. 160 kPa
D. 180 kPa
Question 2
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. 6 m/s^2
B. 8 m/s^2
C. 10 m/s^2
D. 12 m/s^2
Question 3
A sound wave with a frequency of 200 Hz is emitted from a source. If the speed of sound in air is 343 m/s, what is the wavelength of the sound wave?
A. 1.71 m
B. 0.171 m
C. 17.1 m
D. 171 m
Question 4
A 2.0 kg block is attached to a horizontal spring with a force cons\tant of 100 N/m. If the block is displaced by 0.1 m from its equilibrium position and released, what is its maximum speed?
A. 0.5 m/s
B. 1.0 m/s
C. 1.5 m/s
D. 2.0 m/s
Question 5
A heat engine operates between two temperatures, 300 K and 400 K. If the efficiency of the engine is 20%, what is the work done per cycle?
A. 100 J
B. 200 J
C. 300 J
D. 400 J
Question 6
A wave has a frequency of 50 Hz and a wavelength of 0.1 m. What is the speed of the wave?
A. 5 m/s
B. 10 m/s
C. 20 m/s
D. 50 m/s
Question 7
A particle of mass $m$ is moving in a circular orbit of radius $r$ with speed $v$. If the particle is subject to a centripetal force $F_c$, find the magnitude of the force.
A. \frac{mv^2}{r}
B. \frac{mv^2}{2r}
C. \frac{mv^2}{3r}
D. \frac{mv^2}{4r}
Question 8
A thermodynamic system undergoes a process from state A to state B. If the system's internal energy increases by 100 J and the work done on the system is 50 J, what is the heat added to the system?
A. 150 J
B. 200 J
C. 250 J
D. 300 J
Question 9
A 10 μC charge is placed at the center of a circular loop of radius 0.5 m. Calculate the electric field at a point on the loop 0.2 m from the center.
A. 10 N/C
B. 20 N/C
C. 30 N/C
D. 40 N/C
Question 10
A particle is confined to a one-dimensional box of length 1.0 m. If the particle has a mass of 9.11 x 10^-31 kg, what is the energy of the particle?
A. 1.56 x 10^-36 J
B. 1.56 x 10^-34 J
C. 1.56 x 10^-32 J
D. 1.56 x 10^-30 J
Question 11
A 10 V battery is connected in series with a 5 Ω resistor and a 2 Ω resistor. What is the current flowing through the circuit?
A. 0.5 A
B. 1 A
C. 2 A
D. 3 A
Question 12
A parallel plate capacitor has plates of area 0.04 m^2 and separation 0.02 m. If the capaci\tance is 8.0 x 10^-12 F, what is the charge on the plates?
A. 2.0 x 10^-6 C
B. 4.0 x 10^-6 C
C. 6.0 x 10^-6 C
D. 8.0 x 10^-6 C
Question 13
A radioactive sample decays at a rate of 0.05% per hour. If the initial activity is 1000 Bq, what is the activity after 6 hours?
A. 500 Bq
B. 750 Bq
C. 900 Bq
D. 950 Bq
Question 14
A particle of mass 1 kg is moving in a straight line with an initial velocity of 5 m/s. If the particle is subjected to a force of 10 N, what is the acceleration of the particle?
A. 1 m/s^2
B. 2 m/s^2
C. 5 m/s^2
D. 10 m/s^2
Question 15
A capacitor consists of two parallel plates separated by a dis\tance of 2 mm. If the charge on each plate is 10 μC, what is the capaci\tance of the capacitor?
A. 5 μF
B. 10 μF
C. 15 μF
D. 20 μF

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