What best describes smart materials?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Master the IGCSE Design and Technology Test. Experience comprehensive exam preparation with flashcards and multiple choice questions, complete with hints and explanations. Equip yourself with confidence for the big day!

Multiple Choice

What best describes smart materials?

Explanation:
Smart materials respond to an external stimulus and then return to their original state when that stimulus is removed. This reversibility—the ability to change in response to something like heat, light, electric or magnetic fields, or stress, and then go back once the stimulus is gone—is what defines them. For example, a shape memory alloy can be deformed and then recover its original shape when heated; a thermochromic material changes color with temperature and returns as it cools; a piezoelectric material changes shape under an electric field and relaxes when the field is removed. The other options don’t capture this stimulus-driven, reversible behavior.

Smart materials respond to an external stimulus and then return to their original state when that stimulus is removed. This reversibility—the ability to change in response to something like heat, light, electric or magnetic fields, or stress, and then go back once the stimulus is gone—is what defines them. For example, a shape memory alloy can be deformed and then recover its original shape when heated; a thermochromic material changes color with temperature and returns as it cools; a piezoelectric material changes shape under an electric field and relaxes when the field is removed. The other options don’t capture this stimulus-driven, reversible behavior.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy