Sound wave
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6 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1.Which of the following uses ultrasound?
Echo Cardiography
SONAR
Sonography
All of these
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2. What should be the minimum distance between the source and reflector in water so that echo is her distinctly ? (speed of sound in water 1400 m/s)
70 m
17 m
17 - 18
None of these
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
3. By increasing length of the pendulum it's frequency is:
Decreases
Increases
Doesn't change
None of thess
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
4. Human ear can hear sound wave of 20 Hz. It's wavelength will be: ( speed of sound 330 m/s)
20 m
16.5 m
16.5 mm
Data is insufficient
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
5. Oscillating pendulum in air performs:
Free vibration
Damped vibration
Resonance vibration
All of the above
6.
OPEN ENDED QUESTION
30 sec • Ungraded
Name
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