Physics, 15.08.2020 08:01 hadellolo8839
12 The graph shows the variation with voltage Vacross a filament lamp with the current I though the lamp
mA
30
25
1.5
1.0
# Suggest whether the resistor obeys Ohm's law.
i Calculate the resistance of the lamp when V=4.0 V.
The resistivity of the filament of the lamp at a voltage of 4.0 V is 3.0 x 10-22m. The radius of the
filament is 0.25 mm. Calculate the length of the filament.
05
0.0
00
1.0
2.0
3.0
4.0
5.0
6.0
VIV
[2]
[2]
5 ELECTRICITY AND MAGNETISM
245
Answers: 3
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