Headings Mains Electricity Search Questions 
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The Resistance of Wires - Temperature.
The resistance of a wire will increase as its temperature increases.
A small increase in
temperature
may not give a
noticeable change in resistance
but the more the temperature
rises,
the more obvious it becomes that the resistance is also rising.
This can be clearly seen in
the
Voltage against Current
plot for a lamp.
The thin wire inside the lamp
(called the filament)
becomes white hot, which causes the
lamp to shine.
The increase in resistance can be seen by the curved line in the plot.
Headings Mains Electricity Search Questions
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