हिंदी

If 20 compressions pass a point in 4 seconds, the frequency is ______.

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प्रश्न

If 20 compressions pass a point in 4 seconds, the frequency is ______.

विकल्प

  • 80 Hz

  • 5 Hz

  • 10 Hz

  • 0.2 Hz

MCQ
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उत्तर

If 20 compressions pass a point in 4 seconds, the frequency is 5 Hz.

Explanation:

Number of compressions = 20

Time = 4 seconds

We know that,

\[ \text{Frequency}=\frac{\text{Number of compressions}}{\text{Time}} \]
\[ f=\frac{20}{4}=\boxed{5\text{ Hz}} \]

Hence, the frequency is 5 Hz.

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अध्याय 10: Sound Waves: Characteristics and Applications - Revise, Reflect, Refine [पृष्ठ २०५]

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एनसीईआरटी Science Exploration [English] Class 9
अध्याय 10 Sound Waves: Characteristics and Applications
Revise, Reflect, Refine | Q 3. | पृष्ठ २०५
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