Physics Test #4 – Sound

Instructions: 10 MCQs | +4 for Correct | –1 for Incorrect | Instant Result!

1. Sound is a:
a) Transverse wave b) Longitudinal wave c) Electromagnetic wave d) Stationary wave

2. Which of these materials will sound travel fastest in?
a) Vacuum b) Air c) Water d) Steel

3. The speed of sound in air at room temperature is approximately:
a) 300 m/s b) 340 m/s c) 1500 m/s d) 5000 m/s

4. The unit of frequency is:
a) m/s b) m c) hertz d) s

5. Loudness of sound depends on:
a) Frequency b) Amplitude c) Wavelength d) Speed

6. Which device uses reflected sound waves for location?
a) X-ray b) Thermometer c) SONAR d) Laser

7. Echo is heard only if the reflected sound reaches the listener after:
a) 0.01s b) 0.05s c) 0.1s d) 1s

8. Sound can travel through:
a) Vacuum b) Only solids c) Solids, liquids and gases d) Only gases

9. v = f × λ. If frequency increases, then wavelength:
a) Remains same b) Becomes zero c) Decreases d) Increases

10. Ultrasound has frequency:
a) Less than 20 Hz b) 20–20,000 Hz c) More than 20,000 Hz d) Infinite Hz

📊 Your Score

✅ Type N to continue to Physics Test 5: Why Do We Fall Ill?
📦 Type FINAL to export your full Foundation Test Report