POST UTME UNIOSUN 2017 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 1000 Ω resistor is connected in series with a 2000 Ω resistor and a 20 V battery. U\sing Kirchhoff's Voltage Law, calculate the current flowing through the 1000 Ω resistor.
A. 0.01 A
B. 0.02 A
C. 0.03 A
D. 0.04 A
Question 2
A radioactive sample emits \alpha particles with a half-life of 5 days. If the initial activity is 100 Bq, what is the activity after 20 days?
A. 12.5 Bq
B. 25 Bq
C. 50 Bq
D. 100 Bq
Question 3
A 5 Ω resistor is connected in parallel with a 10 Ω resistor. What is the equivalent resis\tance of the circuit?
A. 2.5 Ω
B. 3.3 Ω
C. 4.5 Ω
D. 5.6 Ω
Question 4
A gas occupies a volume of 2.5 L at a pressure of 1.5 atm and a temperature of 300 K. Calculate the new volume if the pressure is doubled and the temperature is tripled.
A. 5.0 L
B. 6.25 L
C. 7.5 L
D. 10.0 L
Question 5
A sound wave has a frequency of 200 Hz and a speed of 340 m/s. What is the wavelength of the wave?
A. 1.7 m
B. 1.8 m
C. 1.9 m
D. 2.0 m
Question 6
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 centripetal acceleration of the particle?
A. 12 m/s^2
B. 16 m/s^2
C. 20 m/s^2
D. 24 m/s^2
Question 7
A particle of mass 0.5 kg is moving in a circular path with a radius of 2 m and a speed of 4 m/s. Calculate the centripetal force acting on the particle.
A. 1.0 N
B. 2.0 N
C. 4.0 N
D. 6.0 N
Question 8
A 10 μF capacitor is connected in series with a 5 kΩ resistor and a 9 V battery. What is the time cons\tant of the circuit?
A. 0.5 s
B. 1 s
C. 2 s
D. 5 s
Question 9
A fluid of density 1000 kg/m^3 is flowing through a horizontal pipe with a cross-sectional area of 0.01 m^2. If the pressure drop across the pipe is 1000 Pa, what is the speed of the fluid?
A. 10 m/s
B. 20 m/s
C. 30 m/s
D. 40 m/s
Question 10
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 11
A nucleus of mass number $A$ and atomic number $Z$ undergoes \beta decay. What is the resulting nucleus?
A. A-1,Z+1
B. A+1,Z-1
C. A,Z
D. A,Z+1
Question 12
A block of mass 5 kg is placed on a frictionless surface. A force of 10 N is applied to the block. What is the acceleration of the block?
A. \( \frac{10}{5} \) m/s^2
B. \( \frac{5}{10} \) m/s^2
C. \( \frac{10}{5} \) m/s^2
D. \( \frac{5}{10} \) m/s^2
Question 13
A wave has a frequency of 20 Hz and a wavelength of 0.5 m. What is the speed of the wave?
A. 10 m/s
B. 20 m/s
C. 30 m/s
D. 40 m/s
Question 14
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 15
A particle moves in a circular path with a radius of 2 m. If it completes one revolution in 4 s, what is its angular velocity?
A. 1.57 rad/s
B. 3.14 rad/s
C. 6.28 rad/s
D. 12.56 rad/s

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