How can anything be an ohmic conductor?
strictly speaking nothing is ohmic
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Is there anything where the temperature/resistance doesnt increase as you increase the voltage?
no
But what do you mean by "temperatureresistance"?
Ohm's law says that when you put a current through anything energy is supplied by that current. The energy has to go someplace. That is the heat which increases the temperature.
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More importantly, how can metal wire be an ohmic conductor?
because in most cases the resistance does not change all that much. (the temperature change of a light bulb is from 100 degrees to 8000 degrees)
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Doesn't the temp increase with V?
In a simplified way, no the temp increases because the voltage increases not the other way around
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What's a light filament made out of then as i thought it was just a metal wire.
It is made of metal (tungsten) The first ones were made of carbon.
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My answers can be made more general at the cost of greater complication. Ohm's Law is so useful because many conductors have a very small temperature coefficient and in most cases only small temperature changes are encountered.
