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samblue
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Homework Statement
Define resistance and resistivity? A 30W, 6A bulb has a filiment which is directly prortional to the absolute temperature? At 37 degrees celcius the reisitance of the fimament is 015ohms. What is the working temperature of the filament?
Homework Equations
None given. But from my attempt I have used V=IR, P=IV.
The Attempt at a Solution
Resistance is a measure of a materials ability to pass charge. Reisistivity is a constant for each material which allows us to calculate the resitance, thus it is the ability for a material to pass current.
Ok so I worked out the current using P=IV
getting: I=6A
I then used this to work out the resistacne using V=IR
getring R=1.2ohms.
Im stuck here and don't know what to do, can someone please give me some hints or a rough idea about how to go about solving this problem? thanks