State whether resistance of the filament of an electric lamp increases or decreases when it is glowing and pls explain why?
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Answered by
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filament lamp is a common type of light bulb. It contains a thin coil of wire called the filament. This heats up when an electric current passes through it, and produces light as a result.
The resistance of a lamp increases as the temperature of its filament increases. The current flowing through a filament lamp is not directly proportional to the voltage across it.
The resistance of a lamp increases as the temperature of its filament increases. The current flowing through a filament lamp is not directly proportional to the voltage across it.
vivee2:
what is the slope representing in the graph of voltage and current
hi
pls ans
plllsss
which graph?
according to ohms law,we have a graph representing voltage and current.The slope represents?
in ohm's law graph is plotted b/w current nd potential difference
nd the slope represents as resistance
ok tnq
wlcm ...
Answered by
4
Here is the answer.
Resistance of the filament and brightness is directly proportional. As the resistance increases more of the energy will be emitted as heat and light ,thus the brightness increases.
Hope it helps. :)
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