Applications of Ultrasound

Q.

Explain how defects in a metal block can be detected using ultrasound.

Q.

How is ultrasound is used for cleaning. Explain.

Q.

Ultrasonic waves are made to reflect from various parts of the heart and form the image of the heart. This technique is called

___ .

Q. Bats can produce and hear infrasonic sound.

1. True
2. False

Q.

Ultrasonic waves are made to reflect from various parts of the heart and form the image of the heart. This technique is called ___.

Q.

Ultrasonic waves are made to reflect from various parts of the heart and form the image of the heart. This technique is called___ .

Q.

In a sonar, ultrasonic waves are sent into the sea water and the reflected waves from a sunken ship are received after 2.0 s. If the velocity of waves in sea water is $1450{ms}^{-1}$​, find the depth of sunken ship.

1. $2800\text{m}$
2. $3000\text{m}$
3. $2900\text{m}$
4. $1450\text{m}$

Q. Which type of frequency do bats use for echolocation?

1. Sonic
2. Ultrasonic
3. Infrasonic
4. Supersonic

Q. Sonography is based on piezoelectric effect

1. True
2. False

Q.

Which of the following correctly supports the fact that bats can hunt at night?

1. They have an excellent eyesight.

2. They can smell their prey.

3. They use ultrasonic waves to detect the position of the prey.

4. They have excellent camouflage capability.