Two

Five

Four

Three

Single Phase Dual Throw

Single Pole Single Throw

Single Pole Double Throw

Shared Pole Double Throw

40:60

20:40

60:40

63:37

After the solder melts

When the solder is melting

During the solder is melting

When the solder is heated

It is non-conductive

It is good conductor

It is a chemical paste

Inorganic acid in nature