Question

Ultrasonic transducers in medical imaging are based on

• A. Hall effect
• B. Photoelectric effect
• C. Magnetostriction
• D. Piezoelectric effect

Hint:

Ultrasound transducers commonly use piezoelectric materials such as \[ \boxed{\text{PZT (Lead Zirconate Titanate).}} \]

Answer 1

The Correct Option is D

Step 1: Recall the working principle of ultrasonic transducers. Ultrasonic transducers use the piezoelectric effect, in which certain crystals generate mechanical vibrations when an electric voltage is applied and produce electrical signals when subjected to mechanical pressure.

Step 2: Identify the correct option. Since ultrasound generation and detection both rely on the piezoelectric effect, \[ \boxed{\text{Piezoelectric effect}} \] is the correct answer. Therefore, \[ \boxed{(D)} \] is the correct answer.