How does the wire in the filament of a light bulb behave differently to the other wires in the circuit when the current flows?
What property of the filament wire accounts for this difference?
|Filament of a light bulb||Connecting wire|
|The wire in the filament of a light bulb has a high resistance and a high melting point. So, it heats up without melting and glows when the current flows through it.||The connecting wire in a circuit has a low resistance and a low melting point. So, it does not heat up much when the current flows through it and thus does not glow.|
It is the high melting point of the filament wire that is accountable for this difference.
Video Tutorials For All Subjects
- Heating Effect of Electric Current