I wanna know how does the temperature affect the resistance of the wire.
Cold decreases the resistance. Anything becomes more stable with cold temp. which calms down atoms so they are more condensed or alligned which allows easier conductivity of electricity. You computer chips uses materials whose atoms are already condensed or alligned to carry these 'messages'. Research shows atoms' basic properties can be altered with extreme cold temperatures.
as temperature increases, resistance also goes up. the reverse is also true. at most temperatures comfortable to humans, it is not a signifigant factor. that's the general answer. if you need specifics, the electrical code will give you very specific answers.
Depends on the conductor. Copper has a positive temperature coefficient, silver alloy has a negative temperature coefficient, as do the semiconductors.
Cold wire is a better conductor of electricity than hot wire. Atoms are closer together when cold, making it easier for electrons to jump from atom to atom.
