POST UTME BOWEN UNIVERSITY 2020 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A magnetic field of strength 0.5 T is directed along the z-axis. If a current of 2 A is flowing in a wire loop of radius 0.2 m, what is the magnitude of the magnetic moment of the loop?
A. 0.1 π A m^2
B. 0.125 π A m^2
C. 0.15 π A m^2
D. 0.2 π A m^2
Question 2
A fluid of density 1000 kg/m³ is flowing through a pipe of radius 0.1 m with a velocity of 2 m/s. What is the pressure at the center of the pipe?
A. 1000 Pa
B. 2000 Pa
C. 3000 Pa
D. 4000 Pa
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 subjected 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 gas is enclosed in a container of volume 2 m^3 at a pressure of 1 atm. If the temperature is increased by 10°C, what is the new pressure of the gas?
A. 1.2 atm
B. 1.5 atm
C. 2.0 atm
D. 2.5 atm
Question 5
A radioactive sample has a half-life of 10 years. If the initial activity of the sample is 100 Bq, what is the activity of the sample after 20 years?
A. 12.5 Bq
B. 25 Bq
C. 50 Bq
D. 100 Bq
Question 6
A 100 V, 50 Hz AC supply is connected to a 50 Ω resistor. What is the rms value of the current flowing through the resistor?
A. 0.5 A
B. 1 A
C. 1.5 A
D. 2 A
Question 7
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. 5 m
B. 10 m
C. 15 m
D. 20 m
Question 8
A radioactive sample has a half-life of 5 years. If the initial activity is 1000 Bq, what is the activity after 10 years?
A. 125 Bq
B. 250 Bq
C. 500 Bq
D. 1000 Bq
Question 9
A block of mass 5 kg is moving with a velocity of 10 m/s. If a force of 20 N is applied to the block, what is the acceleration of the block?
A. 4 m/s^2
B. 8 m/s^2
C. 12 m/s^2
D. 16 m/s^2
Question 10
A capacitor of capaci\tance 10 μF is connected in series with a resistor of resis\tance 20 Ω. If a voltage of 50 V is applied across the circuit, what is the current flowing through the circuit?
A. 1.25 A
B. 2.5 A
C. 5 A
D. 10 A
Question 11
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. 10 m/s^2
B. 12 m/s^2
C. 15 m/s^2
D. 20 m/s^2
Question 12
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 force acting on the particle?
A. 8 N
B. 12 N
C. 16 N
D. 20 N
Question 13
A photon of energy 2 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 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. What is the magnitude of the centripetal acceleration of the particle?
A. 4 m/s^2
B. 8 m/s^2
C. 12 m/s^2
D. 16 m/s^2
Question 15
A gas is heated from 20°C to 50°C. If the initial volume is 2 L, what is the final volume?
A. 4 L
B. 6 L
C. 8 L
D. 10 L

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