POST UTME BABCOCK UNIVERSITY 2022 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 5 Ω resistor is connected in parallel with a 10 Ω resistor. What is the total resis\tance in the circuit?
A. 2.5 Ω
B. 3.33 Ω
C. 5 Ω
D. 10 Ω
Question 2
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 30° above the horizontal. If air resis\tance is neglected, what is the maximum height reached by the projectile?
A. 5.0 m
B. 10.0 m
C. 15.0 m
D. 20.0 m
Question 3
A radioactive sample of Δₗ emits Δₗπ particles with a half-life of 3.8 × 10¹ years. If the initial activity is 1.2 × 10¹ Bq, what is the activity after 1.2 × 10¹ years?
A. 0.5 × 10¹ Bq
B. 1.2 × 10¹ Bq
C. 2.4 × 10¹ Bq
D. 6.0 × 10¹ Bq
Question 4
A 5 Ω resistor is connected in parallel with a 10 Ω resistor. If a 15 V battery is connected across the circuit, what is the total resis\tance of the circuit?
A. 2.5 Ω
B. 3.3 Ω
C. 4.2 Ω
D. 5.6 Ω
Question 5
A 100 Ω resistor is connected in series with a 200 Ω resistor and a 300 Ω resistor. If a 12 V battery is connected across the circuit, what is the total resis\tance of the circuit?
A. 100 Ω
B. 200 Ω
C. 300 Ω
D. 600 Ω
Question 6
A uniform magnetic field of strength 2 T is applied to a current-carrying wire of length 0.5 m. If the current in the wire is 5 A, calculate the magnitude of the force exerted on the wire.
A. 0.25 N
B. 0.5 N
C. 1 N
D. 2 N
Question 7
A sound wave with a frequency of 200 Hz and an amplitude of 0.5 mm is traveling through a medium with a speed of 340 m/s. If the wave is reflected off a fixed \end, what is the maximum displacement of the wave at the fixed \end?
A. 0.25 mm
B. 0.5 mm
C. 0.75 mm
D. 1.0 mm
Question 8
A radioactive sample decays at a rate of 0.05% per hour. If the initial mass of the sample is 100 g, how much of the sample will remain after 5 hours?
A. 90 g
B. 95 g
C. 99 g
D. 100 g
Question 9
A particle is projected at an angle of 60° to the horizontal with an initial velocity of 20 m/s. What is the time of flight?
A. 2 s
B. 4 s
C. 6 s
D. 8 s
Question 10
A circuit consists of a resistor of resis\tance 10 Ω and a capacitor of capaci\tance 20 μF connected in series. If a voltage of 100 V is applied across the circuit, what is the current flowing through the circuit?
A. 0.1 A
B. 0.2 A
C. 0.3 A
D. 0.4 A
Question 11
A block of mass 2 kg is placed on a frictionless surface and attached to a horizontal spring with spring cons\tant 50 N/m. The block is displaced by 0.1 m from its equilibrium position and released from rest. Assuming the motion is simple harmonic, calculate the angular frequency of the block.
A. 1 rad/s
B. 2 rad/s
C. 3 rad/s
D. 4 rad/s
Question 12
A body of mass 5 kg is moving with a velocity of 10 m/s. If it 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 13
A block of mass 2 kg is susp\ended from a spring with a spring cons\tant of 100 N/m. Calculate the frequency of oscillation of the block.
A. 1 Hz
B. 2 Hz
C. 5 Hz
D. 10 Hz
Question 14
A 2.0 m long wire is carrying a current of 5.0 A. If the wire is placed in a magnetic field of strength 0.50 T, what is the magnitude of the force exerted on the wire?
A. 0.25 N
B. 0.50 N
C. 1.0 N
D. 2.0 N
Question 15
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

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