POST UTME BABCOCK UNIVERSITY 2022 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A particle of mass 0.5 kg is attached to a spring with spring cons\tant 100 N/m. It is displaced by 0.2 m from its equilibrium position and released from rest. Assuming the motion is simple harmonic, calculate the total energy of the particle at time t = 0.
A. 0.5 J
B. 1 J
C. 2 J
D. 5 J
Question 2
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 3
A 10 μF capacitor is connected in series with a 20 Ω resistor and a 100 V battery. Determine the time cons\tant of the circuit.
A. 0.2 s
B. 0.5 s
C. 1 s
D. 2 s
Question 4
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 5
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 6
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 7
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 8
A 20 Ω resistor is connected in series with a 10 μF capacitor and a 50 Hz AC source. If the voltage across the capacitor is 100 V, what is the current in the circuit?
A. 0.5 A
B. 1 A
C. 2 A
D. 5 A
Question 9
A ray of light passes from air into a glass slab of re\fractive index 1.5. If the angle of incidence is 30°, what is the angle of re\fraction?
A. 20°
B. 25°
C. 30°
D. 35°
Question 10
A 2 kg block is attached to a horizontal, massless spring with a spring cons\tant of 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. 0.2 m/s
B. 0.4 m/s
C. 0.6 m/s
D. 0.8 m/s
Question 11
A circuit consists of a 10 Ω resistor, a 20 Ω resistor, and a 5 Ω resistor connected in series. Calculate the equivalent resis\tance of the circuit.
A. 35 Ω
B. 40 Ω
C. 45 Ω
D. 50 Ω
Question 12
A radioactive sample has a half-life of 5 years. If the initial activity is 100 Bq, what is the activity after 10 years?
A. 12.5 Bq
B. 25 Bq
C. 50 Bq
D. 100 Bq
Question 13
A capacitor of capaci\tance 10 μF is charged to a potential difference of 5 V. Calculate the energy stored in the capacitor.
A. 0.25 J
B. 0.5 J
C. 1 J
D. 2 J
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. 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 15
A block of mass 5 kg is placed on a frictionless surface and connected to a spring with a spring cons\tant of 200 N/m. If the block is displaced by 1 m from its equilibrium position and released from rest, determine the maximum speed of the block as it passes through the equilibrium position.
A. 10 m/s
B. 20 m/s
C. 30 m/s
D. 40 m/s

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