POST UTME BOWEN UNIVERSITY 2019 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A particle moves in a circular path with a cons\tant speed of 5 m/s. If the radius of the circle is 2 m, what is the magnitude of the acceleration of the particle?
A. 1.0 m/s^2
B. 2.0 m/s^2
C. 3.0 m/s^2
D. 4.0 m/s^2
Question 2
A gas is enclosed in a container with a movable piston. The gas is heated at cons\tant pressure. Which of the following statements is true?
A. The volume of the gas increases exponentially with temperature.
B. The volume of the gas increases linearly with temperature.
C. The volume of the gas remains cons\tant with temperature.
D. The volume of the gas decreases exponentially with temperature.
Question 3
A magnetic field of strength 0.5 T is applied to a current-carrying wire of length 2 m. If the current flowing through the wire is 5 A, calculate the force experienced by the wire.
A. 2.5 N
B. 2.5 mN
C. 2.5 μN
D. 2.5 kN
Question 4
A capacitor of capaci\tance 2 μF is connected in series with a resistor of resis\tance 10 kΩ. If a voltage of 12 V is applied across the circuit, calculate the current flowing through the circuit.
A. 1.2 mA
B. 1.2 μA
C. 1.2 A
D. 1.2 kA
Question 5
A photon of energy 2.5 eV is incident on a metal surface. If the work function of the metal is 1.5 eV, calculate the kinetic energy of the electron emitted.
A. 1 eV
B. 1.5 eV
C. 2 eV
D. 2.5 eV
Question 6
A block of mass 2 kg is susp\ended from a spring with spring cons\tant 100 N/m. If the block is displaced by 0.2 m from its equilibrium position and released from rest, what is the maximum speed of the block?
A. 1.0 m/s
B. 2.0 m/s
C. 3.0 m/s
D. 4.0 m/s
Question 7
A radioactive sample has a half-life of 10 years. If the initial activity is 100 Bq, what is the activity after 20 years?
A. 12.5 Bq
B. 25 Bq
C. 50 Bq
D. 100 Bq
Question 8
A 100 V AC supply is connected to a 50 Ω resistor. What is the current drawn?
A. 0.5 A
B. 1 A
C. 2 A
D. 5 A
Question 9
A light ray passes from air into a glass block with a re\fractive index of 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 10
A vector \vec{A} has magnitude 5.0 m and direction 30° north of east. If a second vector \vec{B} has magnitude 3.0 m and direction 60° south of west, what is the magnitude of the resul\tant vector \vec{A} + \vec{B}?
A. 4.0 m
B. 5.0 m
C. 6.0 m
D. 7.0 m
Question 11
A ray of light passes through a prism and is re\fracted at an angle of 30°. If the angle of incidence is 20°, what is the angle of emergence?
A. 10°
B. 20°
C. 30°
D. 40°
Question 12
A container of volume 2.0 L is filled with 1.0 mol of an ideal gas at 300 K. If the gas is heated to 400 K, what is the new volume of the gas?
A. 1.5 L
B. 2.0 L
C. 2.5 L
D. 3.0 L
Question 13
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 15 days?
A. 12.5 Bq
B. 25 Bq
C. 50 Bq
D. 100 Bq
Question 14
A radioactive sample decays at a rate of 0.5% per hour. If the initial activity is 1000 Bq, what is the activity after 2 hours?
A. 900 Bq
B. 950 Bq
C. 975 Bq
D. 990 Bq
Question 15
A gas occupies a volume of 2 L at a pressure of 1 atm. If the temperature is increased to 300 K, what is the new volume of the gas?
A. 2.5 L
B. 3.0 L
C. 3.5 L
D. 4.0 L

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