Question

Automatic wrist watches get energy from:

  1. Cranial spasms
  2. Battery
  3. From liquid crystal
  4. From the various movements of our hands

Answer:

Option D: From the various movements of our hands

Detailed Solution:

The correct answer is “From the various movements of our hands”.

Automatic wrist watches, also known as self-winding watches, are powered by the kinetic energy generated from the natural movements of the wearer's wrist. This energy is transferred to a rotor inside the watch, which winds the mainspring and powers the watch.