iv graph of a filament bulb!!
why does the line on an iv graph for a filament bulb curve? thank you!!
Original post by indiequeen
why does the line on an iv graph for a filament bulb curve? thank you!!
The resistance of the filament increases with temperature (described as a positive resistance thermal coefficient).
Increasing the voltage across the filament causes it to heat up and this in turn causes it's resistance to increase. i.e. The iv graph is not a linear ohmic relationship.
Original post by uberteknik
The resistance of the filament increases with temperature (described as a positive resistance thermal coefficient).
Increasing the voltage across the filament causes it to heat up and this in turn causes it's resistance to increase. i.e. The iv graph is not a linear ohmic relationship.
Increasing the voltage across the filament causes it to heat up and this in turn causes it's resistance to increase. i.e. The iv graph is not a linear ohmic relationship.
thank you so much!!!
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