POST UTME BSU 2018 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A simple harmonic motion is described by the equation x(t) = 2 \cos\( 3t + \phi \). If the amplitude of the motion is 2 m, what is the value of the phase angle \phi?
A. 0°
B. 30°
C. 60°
D. 90°
Question 2
A heat engine operates between two reservoirs at temperatures 500 K and 300 K. If the engine receives 100 J of heat from the high-temperature reservoir, what is the efficiency of the engine?
A. 0.25
B. 0.33
C. 0.50
D. 0.67
Question 3
A parallel plate capacitor has a capaci\tance of 10 μF. If a potential difference of 5 V is applied across the plates, calculate the charge stored on the capacitor.
A. 50 μC
B. 100 μC
C. 200 μC
D. 500 μC
Question 4
A 10 μF capacitor is connected in series with a 20 Ω resistor and a 100 V battery. Calculate the time cons\tant of the circuit.
A. 2 s
B. 4 s
C. 6 s
D. 8 s
Question 5
A block of mass 5 kg is placed on a horizontal surface. If a force of 10 N is applied to the block, calculate the acceleration of the block.
A. 0.5 m/s^2
B. 1.0 m/s^2
C. 2.0 m/s^2
D. 5.0 m/s^2
Question 6
A 2 kg object is moving in a circular path of radius 4 m with a cons\tant speed of 5 m/s. If the object is subjected to a centripetal acceleration of 3 m/s^2, what is the magnitude of the force acting on the object?
A. 20 N
B. 25 N
C. 30 N
D. 35 N
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 acceleration of 2 m/s^2, what is the magnitude of the force acting on the particle?
A. 10 N
B. 12 N
C. 15 N
D. 18 N
Question 8
A photon of energy 2.5 eV is incident on a metal surface with a work function of 1.5 eV. What is the maximum kinetic energy of the photoelectron?
A. 0.5 eV
B. 1 eV
C. 1.5 eV
D. 2 eV
Question 9
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 acceleration of 2 m/s^2, what is the magnitude of the force acting on the particle?
A. 10 N
B. 12 N
C. 15 N
D. 18 N
Question 10
A radioactive sample has an initial activity of 100 Bq. If the half-life of the sample is 2 hours, calculate the activity of the sample after 4 hours.
A. 25 Bq
B. 50 Bq
C. 75 Bq
D. 100 Bq
Question 11
A 100 Ω resistor is connected in series with a 200 Ω resistor and a 9.0 V battery. If the current in the circuit is 1.0 A, what is the voltage drop across the 100 Ω resistor?
A. 5.0 V
B. 10 V
C. 15 V
D. 20 V
Question 12
A 100 V AC source is connected in series with a 20 Ω resistor. What is the current flowing through the circuit?
A. 5 A
B. 10 A
C. 20 A
D. 50 A
Question 13
A 5.0 μF capacitor is connected in series with a 2.0 kΩ resistor and a 9.0 V battery. If the capacitor is initially uncharged, what is the time cons\tant (τ) of the circuit?
A. 10 ms
B. 20 ms
C. 30 ms
D. 40 ms
Question 14
A 10 μF capacitor is connected in parallel with a 20 μF capacitor. What is the equivalent capaci\tance (Ceq) of the circuit?
A. 10 μF
B. 20 μF
C. 30 μF
D. 40 μF
Question 15
A container of volume 2 m^3 is filled with water. If the density of water is 1000 kg/m^3, calculate the mass of the water in the container.
A. 2000 kg
B. 4000 kg
C. 6000 kg
D. 8000 kg

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