PiezoElectricity and UltraSound Quiz

What does the Piezo effect refer to?

• Producing sound waves

• Creating heat energy

• Generating light energy

• Transferring mechanical energy to electrical energy

What happens when a force is applied to a crystal in the Piezo effect?

• The crystal changes color

• The crystal becomes transparent

• The crystal shrinks

• A separation of charge occurs

What is the reversible effect of Piezoelectricity?

• Generating heat energy

• Creating light energy

• Changing the shape of the crystal

• Producing magnetic fields

How is Ultrasound generated from a crystal?

• By placing the crystal in water

• By applying a direct current to the crystal

• By applying an alternating potential difference to the crystal

• By heating the crystal

What is the main use of a Piezoelectric Transducer?

• Producing heat energy

• Converting physical quantities into electrical signals

• Generating radio waves

• Creating mechanical vibrations

What is the frequency range of Ultrasound waves?

• Above 20,000 Hz

• Between 10,000 Hz and 20,000 Hz

• Below 100 Hz

• Around 5,000 Hz

How is the depth of tissue measured using Ultrasound?

• By measuring the time delay between transmission and reception

• By observing the tissue under a microscope

• By calculating the speed of sound in the tissue

• By analyzing the color of the tissue

What is Acoustic Impedance a measure of?

• The temperature of a medium

• The speed of sound in a medium

• The opposition encountered by sound waves in a medium

• The color of a medium

What is the purpose of a Coupling Medium in Ultrasound imaging?

• To match the impedance between the transducer and skin

• To increase the impedance of the skin

• To decrease the impedance of the skin

• To reflect all ultrasound waves

What happens to the intensity of Ultrasound waves as they travel through a medium?

• It fluctuates randomly

• It remains constant

• It decreases linearly

• It increases exponentially