1

The telephone evolved into different models. It uses the principles of electromagnetism. Alexander Graham Bell was credited as the inventor of modern telephone.

0

Devices like telephones, doorbells, televisions, and radios use magnets in order to operate. Those notes or receipts held by magnets on a refrigerator door are made possible due to the force created by magnets called magnetism.

11

The most significant discoveries in physics that radically altered our understanding of the universe.