2026-2027 Exams Includes Frequently Tested Questions
With Elaborated 100% Correct Complete Solutions
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1. What part of the mass-spring model of vibration represents elasticity?
A. Mass
B. Spring
C. Damper
D. Driving force
{ANSWER: B. Spring}
2. What parameter is missing in the following equation of sinusoidal vibration?
d(t) = sin(2πft + θ)
A. Amplitude
B. Frequency
C. Phase
D. Period
{ANSWER: A. Amplitude}
3. What is the physical parameter related to auditory perception in the last
question?
A. Phase
B. Frequency
C. Wavelength
D. Speed
{ANSWER: B. Frequency}
4. What is the peak amplitude if the peak-to-peak amplitude of a sine wave is 10
mm?
A. 2.5 mm
B. 5 mm
,C. 10 mm
D. 20 mm
{ANSWER: B. 5 mm}
5. How many degrees are there in a quarter of the period of a sinusoidal
vibration?
A. 45
B. 90
C. 180
D. 270
{ANSWER: B. 90}
6. Which is one aspect of auditory perception?
A. Pitch
B. Wavelength
C. Peak amplitude
D. Phase angle
{ANSWER: A. Pitch}
Air Pressure, Intensity and Waves
7. How does air pressure change when altitude increases?
A. Increases
B. Decreases
C. Stays the same
D. Oscillates
{ANSWER: B. Decreases}
8. What is the relationship between sound intensity (I) and pressure (p)?
A. I is proportional to p
B. I is proportional to p²
C. I is proportional to 1/p
D. I is proportional to √p
{ANSWER: B. I is proportional to p²}
, 9. A condensation peak:
A. Moves toward a vibrating source
B. Moves away from a vibrating source
C. Stays at the source
D. Moves only perpendicular to the source
{ANSWER: B. Moves away from a vibrating source}
10. If a sound's frequency (f) is 3500 Hz and the speed of sound (c) is 350 m/s,
what is the wavelength (λ)?
A. 0.01 m
B. 0.1 m
C. 1 m
D. 10 m
{ANSWER: B. 0.1 m}
11. When two points of rarefaction meet, what happens?
A. Cancellation
B. Reinforcement
C. Reflection
D. Absorption
{ANSWER: B. Reinforcement}
12. What is the frequency of a standing wave related to?
A. Length of the string
B. Color of the string
C. Temperature only
D. Amplitude only
{ANSWER: A. Length of string}
13. If the wavelength (λ) of a sound is 50 cm, what size object is likely to produce a
sound shadow?
A. About 5 cm
B. About 50 cm
C. About 5 m