Ultrasound Quiz

Ultrasonic waves have frequencies

• Less than 20 kHz

• more than 20 MHz

• More than 2000 Hz

• More than 20 kHz

Ultrasound waves are

• Sound waves
• Light Waves
• Transverse waves
• Electromagnetic waves
• Radio waves of lower frequency

Ultrasound waves travel fastest in

• Solids

• Liquids

• gases

• vacuum

Ultrasound waves are produced by one of the following method

• Electrostriction

• ElectroMagnetism

• Light waves in water

• Electromagnetic waves

Statement 1 :- Laser is highly Intense beam, Statement 2 :- Concentrate light is highly intense.

• Both 1 and 2 are true, but 2 is not the reason of 1
• Both 1 and 2 are true, and 2 is reason of 1
• Both 1 and 2 are false
• 1 is true and 2 is false
• 2 is true and 1 is false

The speed of ultrasonic waves in vacuum is

• 330 m/s
• 3 x 10^8 m/s
• 6000 m/s
• zero

Which phenomenon is used in the lighter as shown below

• Gas explosion
• Piezo elctricity
• magnetostriction
• lasing

Which of the following equation is used to determine depth of sea/ submarines, etc.

• d=vt/2
• d=vt
• d=vt^2
• d=v^2/t
• None of these

Which of the following causes acoustical grating?

• Magnetic waves
• Electric waves
• Magnetostriction effect
• Ultrasonic waves

What is the principle for measurement of the velocity of ultrasonic waves?

• Magnetostriction effect
• Acceleration effect
• Doppler Effect
• Acoustical grating