Question

Which phenomenon was used by US researchers to develop a wearable device that could generate energy from the swing of an arm while walking or jogging?
[A] Photoelectric effect
[B] Penn effect
[C] Piezoelectric effect
[D] Polar effect

Answer 1

Hello mate here is your answer.....

The option c is the correct answer...

Answer 2

Solution:

Option C is the right answer.

Thus, piezoelectric effect was the phenomenon which was used by the US researchers in developing the wearable device that generated energy from the swing of the arm while walking and jogging.

Basically, this device is about the size of the wristwatch.