Question

Which of these is NOT a feature of Shape Memory Alloys (SMA)?
Low density
Low strain recovery
Biocompatibility
Biodegradability

Answer 1

Low strain recovery . 

this is the answer.
hope you are doing" Introduction to Internet of Things" NPTEL COURSE .

i am also taking that course . we can discuss and solve if you wish to mail me [email protected]

Answer 2

Among the four options mentioned in the question:

The second option,Low strain recovery is not true about the "Shape memory alloys" or the SMA.

SMA are a type of alloy which can resist a huge amount of external force and still don't deform due to it's high flexible physical characteristics.

That's why the "Low strain recovery" is not true about any SMA,it can be recovered from high amount of strains too.