POST UTME VERITAS UNIVERSITY 2021 Physics | Objective

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Question 1 View Details
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 force?
A. 10 N
Correct B. 12 N
C. 15 N
D. 20 N

Correct Answer: B

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Question 2 View Details
A wave has a frequency of 50 Hz and a wavelength of 0.2 m. If the wave is traveling in the positive x-direction, what is the direction of the wave's velocity?
Correct A. positive x-direction
B. negative x-direction
C. positive y-direction
D. negative y-direction

Correct Answer: A

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Question 3 View Details
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 0.1 m from its equilibrium position and released, what is the magnitude of the block's velocity after 0.2 s?
A. 0.5 m/s
Correct B. 1.0 m/s
C. 1.5 m/s
D. 2.0 m/s

Correct Answer: B

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Question 4 View Details
A radioactive sample has a half-life of 10 years. If the initial activity of the sample is 1000 Bq, what is the activity of the sample after 20 years?
A. 100 Bq
Correct B. 200 Bq
C. 500 Bq
D. 1000 Bq

Correct Answer: B

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Question 5 View Details
A particle of mass 1 kg is moving in a circular path of radius 2 m with a cons\tant speed of 3 m/s. If the particle is subjected to a centripetal force of 6 N, what is the magnitude of the force?
A. 8 N
Correct B. 10 N
C. 12 N
D. 15 N

Correct Answer: B

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Question 6 View Details
A 2.5 m long wire of resis\tance 3.0 Ω is stretched to a length of 5.0 m. Assuming the cross-sectional area remains cons\tant, calculate the new resis\tance of the wire.
A. 7.5 Ω
B. 10.0 Ω
Correct C. 12.5 Ω
D. 15.0 Ω

Correct Answer: C

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Question 7 View Details
A 10 kg block is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. The block is displaced by 2.0 m from its equilibrium position and released from rest. Assuming the block undergoes simple harmonic motion, calculate the maximum speed of the block.
A. 2.0 m/s
B. 4.0 m/s
Correct C. 6.0 m/s
D. 8.0 m/s

Correct Answer: C

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Question 8 View Details
A 5.0 μF capacitor is connected in series with a 10 kΩ resistor and a 20 V battery. Calculate the time cons\tant of the circuit.
A. 0.1 s
B. 0.2 s
Correct C. 0.5 s
D. 1.0 s

Correct Answer: C

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Question 9 View Details
A 2.0 kg object is moving in a circular path with a radius of 3.0 m at a speed of 4.0 m/s. Calculate the centripetal force acting on the object.
A. 10 N
B. 20 N
Correct C. 30 N
D. 40 N

Correct Answer: C

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Question 10 View Details
A 10 μF capacitor is connected in parallel with a 20 μF capacitor. Calculate the equivalent capaci\tance of the circuit.
A. 10 μF
B. 20 μF
Correct C. 30 μF
D. 40 μF

Correct Answer: C

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Question 11 View Details
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. 8 N
B. 10 N
Correct C. 12 N
D. 16 N

Correct Answer: C

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Question 12 View Details
A capacitor consists of two parallel plates, each of area 0.1 m^2, separated by a dis\tance of 0.01 m. If the capaci\tance of the capacitor is 10^-6 F, what is the charge stored on the capacitor when a potential difference of 10 V is applied across it?
A. 10^-5 C
Correct B. 10^-6 C
C. 10^-7 C
D. 10^-8 C

Correct Answer: B

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Question 13 View Details
A simple harmonic motion has a period of 2 s and an amplitude of 0.5 m. If the motion starts from its equilibrium position, what is the maximum acceleration of the particle?
A. 2 m/s^2
B. 4 m/s^2
Correct C. 6 m/s^2
D. 8 m/s^2

Correct Answer: C

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Question 14 View Details
A 100 Ω resistor is connected in series with a 200 Ω resistor and a 50 Ω resistor. If a 10 V potential difference is applied across the circuit, what is the current flowing through the 50 Ω resistor?
A. 0.2 A
Correct B. 0.4 A
C. 0.6 A
D. 0.8 A

Correct Answer: B

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Question 15 View Details
A 10 kg block is moving on a frictionless surface with a speed of 5 m/s. If the block is subjected to a force of 20 N, what is the acceleration of the block?
A. 1 m/s^2
B. 2 m/s^2
C. 3 m/s^2
Correct D. 4 m/s^2

Correct Answer: D

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Question 16 View Details
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. 4 m/s^2
B. 6 m/s^2
Correct C. 8 m/s^2
D. 10 m/s^2

Correct Answer: C

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Question 17 View Details
A capacitor consists of two parallel plates, each of area 0.04 m^2, separated by a dis\tance of 0.02 m. If the capaci\tance of the capacitor is 8 x 10^-6 F, what is the charge stored on the capacitor when a potential difference of 12 V is applied across it?
A. 96 C
Correct B. 192 C
C. 288 C
D. 384 C

Correct Answer: B

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Question 18 View Details
A wave has a frequency of 20 Hz and a wavelength of 0.5 m. If the wave is traveling in the positive x-direction, what is the direction of the particle velocity at x = 0.25 m?
Correct A. Positive x-direction
B. Negative x-direction
C. Positive y-direction
D. Negative y-direction

Correct Answer: A

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Question 19 View Details
A magnetic field of 0.5 T is applied to a current-carrying wire of length 2 m. If the current in the wire is 5 A, what is the magnitude of the force exerted on the wire?
A. 1.25 N
Correct B. 2.5 N
C. 5 N
D. 10 N

Correct Answer: B

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Question 20 View Details
A simple harmonic motion has a frequency of 10 Hz and an amplitude of 0.2 m. If the motion starts at its maximum displacement, what is the displacement of the particle at t = 0.1 s?
A. 0.1 m
B. 0.2 m
Correct C. 0.3 m
D. 0.4 m

Correct Answer: C

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Question 21 View Details
A parallel plate capacitor has a capaci\tance of 10 μF. If a potential difference of 12 V is applied across the plates, what is the charge stored on each plate?
A. 120 μC
Correct B. 240 μC
C. 360 μC
D. 480 μC

Correct Answer: B

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Question 22 View Details
A particle of mass 2 kg is moving in a circular path of radius 3 m with a speed of 4 m/s. What is the magnitude of the centripetal force acting on the particle?
A. 6 N
B. 12 N
Correct C. 18 N
D. 24 N

Correct Answer: C

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Question 23 View Details
A convex lens of focal length 20 cm is used to form an image of an object placed 30 cm in front of it. What is the magnification of the image?
A. 1/2
Correct B. 1/3
C. 2/3
D. 3/4

Correct Answer: B

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Question 24 View Details
A body of mass 5 kg is moving with a velocity of 10 m/s. What is its kinetic energy?
A. 250 J
Correct B. 500 J
C. 750 J
D. 1000 J

Correct Answer: B

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Question 25 View Details
A parallel plate capacitor has a capaci\tance of 20 μF. If a potential difference of 15 V is applied across the plates, what is the energy stored in the capacitor?
A. 300 μJ
B. 600 μJ
Correct C. 900 μJ
D. 1200 μJ

Correct Answer: C

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