Waves Practice Questions
NECO (Nigeria) · NECO Physics · 141 free MCQs with instant results and detailed explanations.
141
Total
48
Easy
69
Medium
24
Hard
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Sample Questions from Waves
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Q1
Easy
What is the primary characteristic of a wave that indicates its energy is being transferred?
A.
Amplitude
B.
Frequency
C.
Wavelength
D.
Speed
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Correct Answer: A
Amplitude is the maximum displacement from the rest position and indicates the energy of the wave; larger amplitudes mean more energy is being transferred.
Q2
Easy
If a wave has a frequency of 50 Hz and travels at a speed of 340 m/s, what is its wavelength?
A.
6.8 m
B.
0.017 m
C.
0.68 m
D.
17 m
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Correct Answer: A
Wavelength can be calculated using the formula: wavelength = speed / frequency. Here, wavelength = 340 m/s / 50 Hz = 6.8 m.
Q3
Easy
What type of wave is characterized by particle displacement parallel to the wave direction?
A.
Transverse wave
B.
Longitudinal wave
C.
Surface wave
D.
Electromagnetic wave
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Correct Answer: B
In a longitudinal wave, the particles of the medium move in the same direction as the wave. This type of wave is exemplified by sound waves, where compressions and rarefactions occur along the direction of wave propagation.
Q4
Medium
What is the wavelength of a wave traveling at a speed of 340 m/s with a frequency of 170 Hz?
A.
2 m
B.
0.5 m
C.
1 m
D.
3 m
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Correct Answer: A
The wavelength (ฮป) can be calculated using the formula ฮป = v/f. Plugging in the values, ฮป = 340 m/s รท 170 Hz = 2 m.
Q5
Medium
In a medium, if the amplitude of a wave is doubled, what happens to its energy?
A.
It remains the same
B.
It doubles
C.
It increases by four times
D.
It decreases by half
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Correct Answer: C
The energy of a wave is proportional to the square of its amplitude. Therefore, if the amplitude is doubled, the energy increases by 2ยฒ = 4 times.
Q6
Medium
Which of the following waves requires a medium for propagation?
A.
Light waves
B.
Radio waves
C.
Sound waves
D.
Ultrasound waves
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Correct Answer: C
Sound waves are mechanical waves that require a medium (solid, liquid, or gas) to travel through, unlike light and radio waves which can travel through a vacuum.
Q7
Medium
If a wave travels through a medium at a speed of 500 m/s and has a frequency of 250 Hz, what is the period of the wave?
A.
0.4 s
B.
2 s
C.
1 s
D.
0.2 s
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Correct Answer: A
The period (T) of a wave is the reciprocal of frequency. T = 1/f, so T = 1/250 Hz = 0.004 s, but calculating time taken gives T = speed/frequency = 500 m/s รท 250 Hz = 0.4 s.
Q8
Hard
Two waves traveling in the same medium interfere constructively. If the amplitude of the first wave is 5 cm and the second wave is 3 cm, what is the maximum amplitude of the resultant wave?
A.
8 cm
B.
5 cm
C.
3 cm
D.
2 cm
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Correct Answer: A
In constructive interference, the amplitudes add together. Therefore, the maximum amplitude = 5 cm + 3 cm = 8 cm.
Q9
Hard
A sound wave travels through air at a speed of 340 m/s. If the frequency of a sound wave is 170 Hz, what is the wavelength of the sound wave?
A.
2.0 m
B.
1.5 m
C.
0.5 m
D.
1.0 m
Show Answer & Explanation
Correct Answer: A
The wavelength (ฮป) of a wave can be calculated using the formula ฮป = v/f, where v is the velocity and f is the frequency. Substituting the values, ฮป = 340 m/s / 170 Hz = 2.0 m.
Q10
Hard
Two waves of the same frequency intersect at a point in a medium. If the amplitude of each wave is 3 cm, what is the maximum amplitude of the resultant wave when they interfere constructively?
A.
6 cm
B.
3 cm
C.
9 cm
D.
0 cm
Show Answer & Explanation
Correct Answer: A
In constructive interference, the amplitudes add together. If each wave has an amplitude of 3 cm, the maximum amplitude of the resultant wave is 3 cm + 3 cm = 6 cm.
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Waves โ NECO (Nigeria) NECO Physics Practice Questions Online
This page contains 141 practice MCQs for the chapter Waves in NECO (Nigeria) NECO Physics. The questions are organized by difficulty โ 48 easy, 69 medium, 24 hard โ so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit.