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प्रश्न
A bat emits an ultrasonic sound of frequency 0.25 MHz. Calculate the time in which one vibration is completed.
बेरीज
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उत्तर
Frequency of ultrasound = ƒ = 0.25 MHz
ƒ = 0.25 × 106 Hz
Time in which one vibration is completed = T = `1/"f"`
T = `1/(0.25 xx 10^6) = 100/25 xx 10^-6`
T = 4 × 10-6s
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संबंधित प्रश्न
| Column A | Column B |
| (a) Vibrations cause | (1) absorb sound |
| (b) A shriller sound is | (2) second |
| (c) Unit of frequency | (3) sound |
| (d) Unit of time period | (4) of high pitch |
| (e) Curtains | (5) hertz |
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