POST UTME NILE UNIVERSITY 2022 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A body of mass 2 kg is moving in a circular path with a speed of 4 m/s. What is the centripetal acceleration?
A. 8 m/s^2
B. 10 m/s^2
C. 12 m/s^2
D. 16 m/s^2
Question 2
A heat engine operates between two reservoirs at temperatures 500 K and 300 K. If the engine absorbs 1000 J of heat from the high-temperature reservoir, what is the efficiency?
A. 0.25
B. 0.30
C. 0.35
D. 0.40
Question 3
A coil of wire with 100 turns and a radius of 0.05 m is placed in a magnetic field of strength 0.5 T. If the current in the coil is 2 A, what is the magnitude of the torque experienced by the coil?
A. 0.1 Nm
B. 0.2 Nm
C. 0.3 Nm
D. 0.4 Nm
Question 4
A 10 μF capacitor is connected in series with a 20 Ω resistor and a 50 Hz AC source. What is the impedance of the circuit?
A. 22 Ω
B. 25 Ω
C. 30 Ω
D. 35 Ω
Question 5
A block of mass 2 kg is attached to a horizontal spring with a force cons\tant of 100 N/m. 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 m/s
B. 2 m/s
C. 4 m/s
D. 5 m/s
Question 6
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 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 experiences a centripetal acceleration of 2 m/s^2, what is the magnitude of the force acting on the particle?
A. 6 N
B. 8 N
C. 10 N
D. 12 N
Question 8
A charged particle of mass 1 kg and charge 2 C is moving in a magnetic field of strength 5 T. If the particle experiences a force of 10 N, what is the magnitude of the velocity of the particle?
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s
Question 9
A body of mass 5 kg is moving with a velocity of 10 m/s. If the body is subjected to a force of 20 N, what is the acceleration of the body?
A. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2
Question 10
A gas is heated from 300 K to 400 K at cons\tant volume. If the initial pressure is 2.0 atm, what is the final pressure?
A. 4.0 atm
B. 3.0 atm
C. 2.5 atm
D. 2.0 atm
Question 11
A radioactive sample of Δₗ emits Δₗ⁴ particles with a half-life of 5.27 years. If the initial activity is 120 Bq, what is the activity after 10 years?
A. 60 Bq
B. 40 Bq
C. 20 Bq
D. 10 Bq
Question 12
A vector has a magnitude of 5 m and makes an angle of 30° with the x-axis. What is the y-component of the vector?
A. 2.5 m
B. 3.0 m
C. 3.5 m
D. 4.0 m
Question 13
A radioactive sample has an initial activity of 100 Bq. After 5 minutes, its activity decreases to 50 Bq. What is the half-life of the sample?
A. 10 min
B. 20 min
C. 30 min
D. 40 min
Question 14
A 10 μF capacitor is connected in parallel with a 20 μF capacitor and a 50 Ω resistor. If the voltage across the circuit is 12 V, what is the current flowing through the resistor?
A. 0.2 A
B. 0.4 A
C. 0.6 A
D. 0.8 A
Question 15
A particle of mass 2 kg is projected from the origin with an initial velocity of 20 m/s at an angle of 60° above the horizontal. What is the maximum height reached by the particle?
A. 10 m
B. 15 m
C. 20 m
D. 25 m

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