Ever Wondered How A Light-Bulb Works? It's Simple!
Lightbulbshaveaverysimplestructure.Atthebase,theyhavetwometalcontacts,whichconnecttotheendsofanelectricalcircuit.,Thefilamentisenclosedinaglassbulbthatiseitherevacuatedorfilledwithinertgastoprotectthefilamentfromoxidation.Electriccurrentissupplie...。參考影片的文章的如下:



