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riamspmau
03.07.2019 •
Mathematics
Calculate the resistance of a 270-cm length of copper wire with a 0.030-cm2 cross-sectional area. ( = 1.8 · 10-6 ohm-cm) r = ω 5.4 x 10-1 5.0 x 109 2.0 x 10-18 1.6 x 10-2
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Ответ:
Given:-
The length of copper wire (L) = 270 cm
Area of cross-sectional (A) = 0.030![cm^2](/tpl/images/0045/8397/08d2c.png)
and specific resistance (ρ) =
ohm-cm.
Use the formula R=(Specific resistance*L)/A, to calculate the Resistance(R)
then,
ohm
Simplify:
R = 0.0162 ohm =
ohm
Therefore, the resistance of copper wire is,
Ω
Ответ:
just multiply l•w•d
90m•60m•40m