Multiple Choice Questions

A sound wave has a frequency of 1 kHz and wavelength 50 cm How long will it take to trave...........

General Science (NDA) Physics

A sound wave has a frequency of 1 kHz and wavelength 50 cm. How long will it take to travel 1 km?

This questions was previously asked in

2022 NDA -1 GAT

5 s

4 s

3 s

2 s

- A sound wave has a frequency of 1 kHz and a wavelength of 50 cm.

- Speed of sound calculation: Speed = Frequency × Wavelength = 1000 Hz × 0.5 m = 500 m/s.

- Time calculation: To find time, use the formula: Time = Distance / Speed.

- Distance to travel is 1 km, which is 1000 meters.

- Time taken = 1000 m / 500 m/s = 2 seconds.

- Option Analysis:

- Option 1: 5 s - Too long.

- Option 2: 4 s - Still too long.

- Option 3: 3 s - Not accurate enough.

- Option 4: 2 s - Correct based on calculation.

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