Waves Practice Questions
SPM (Malaysia) · SPM Physics · 142 free MCQs with instant results and detailed explanations.
142
Total
46
Easy
72
Medium
24
Hard
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Sample Questions from Waves
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Q1
Easy
What is the frequency of a wave if its period is 0.25 seconds?
A.
4 Hz
B.
0.25 Hz
C.
2 Hz
D.
1 Hz
Show Answer & Explanation
Correct Answer: A
Frequency is the reciprocal of the period. If the period (T) is 0.25 seconds, then frequency (f) is calculated as f = 1/T. Thus, f = 1/0.25 = 4 Hz.
Q2
Easy
Which type of wave requires a medium to travel through?
A.
Sound waves
B.
Light waves
C.
Radio waves
D.
Electromagnetic waves
Show Answer & Explanation
Correct Answer: A
Sound waves are mechanical waves that require a medium (solid, liquid, or gas) to propagate. In contrast, light and radio waves can travel through a vacuum.
Q3
Easy
If the wavelength of a wave is doubled while the speed remains constant, what happens to the frequency?
A.
It doubles
B.
It halves
C.
It remains the same
D.
It quadruples
Show Answer & Explanation
Correct Answer: B
The relationship between speed (v), frequency (f), and wavelength (ฮป) is given by v = f ร ฮป. If ฮป is doubled and v is constant, frequency must decrease, effectively halving it.
Q4
Medium
What is the relationship between frequency and wavelength in a wave, given the speed of the wave is constant?
A.
Frequency is directly proportional to wavelength.
B.
Frequency is inversely proportional to wavelength.
C.
Frequency is independent of wavelength.
D.
Frequency equals wavelength.
Show Answer & Explanation
Correct Answer: B
Frequency and wavelength are inversely proportional when wave speed is constant, as described by the equation v = fฮป, where v is speed, f is frequency, and ฮป is wavelength.
Q5
Medium
A wave travels through a medium with a speed of 340 m/s and has a frequency of 170 Hz. What is the wavelength of the wave?
A.
2 m
B.
1.5 m
C.
0.5 m
D.
3 m
Show Answer & Explanation
Correct Answer: A
Using the wave speed formula, wavelength (ฮป) can be calculated as ฮป = v / f. Here, ฮป = 340 m/s / 170 Hz = 2 m.
Q6
Medium
Which type of wave requires a medium for propagation?
A.
Electromagnetic waves
B.
Sound waves
C.
Radio waves
D.
Light waves
Show Answer & Explanation
Correct Answer: B
Sound waves are mechanical waves that need a medium (solid, liquid, or gas) to travel, whereas electromagnetic waves do not require a medium.
Q7
Medium
If the amplitude of a wave is doubled, what happens to the energy carried by the wave?
A.
Energy is halved.
B.
Energy remains the same.
C.
Energy is doubled.
D.
Energy is quadrupled.
Show Answer & Explanation
Correct Answer: D
The energy of a wave is proportional to the square of its amplitude. Thus, if the amplitude is doubled, the energy becomes four times greater (2^2 = 4).
Q8
Hard
A wave traveling along a string has a frequency of 5 Hz and a wavelength of 2 m. What is the speed of the wave?
A.
10 m/s
B.
2.5 m/s
C.
7 m/s
D.
12 m/s
Show Answer & Explanation
Correct Answer: A
The speed of a wave is calculated using the formula: speed = frequency ร wavelength. Here, speed = 5 Hz ร 2 m = 10 m/s.
Q9
Hard
When a sound wave travels from air to water, which of the following statements is true regarding its speed and wavelength?
A.
Speed increases and wavelength decreases.
B.
Speed decreases and wavelength increases.
C.
Speed increases and wavelength remains the same.
D.
Speed remains the same and wavelength decreases.
Show Answer & Explanation
Correct Answer: A
When a sound wave enters water from air, its speed increases significantly due to the higher density of water compared to air, which also causes the wavelength to decrease.
Q10
Hard
A wave travels through a medium with a speed of 340 m/s and has a frequency of 170 Hz. What is the wavelength of the wave?
A.
2 m
B.
1 m
C.
0.5 m
D.
3 m
Show Answer & Explanation
Correct Answer: A
Wavelength can be calculated using the formula: wavelength = speed / frequency. Thus, 340 m/s divided by 170 Hz equals 2 m.
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Waves โ SPM (Malaysia) SPM Physics Practice Questions Online
This page contains 142 practice MCQs for the chapter Waves in SPM (Malaysia) SPM Physics. The questions are organized by difficulty โ 46 easy, 72 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.