CBSE Class 10 Answered
copper wire has a diameter of 0.5mm and the resistivity is 1.6x10^-6 ohm cm.how much of the wire would be required to make 10 ohm coil
Asked by rusuishika | 15 Jun, 2020, 16:39: PM
![R equals fraction numerator rho l over denominator A end fraction
R equals fraction numerator rho l cross times 4 over denominator pi d squared end fraction
10 equals fraction numerator 1.6 cross times 10 to the power of negative 6 end exponent cross times l cross times 4 over denominator 3.14 cross times open parentheses 0.5 cross times 10 to the power of negative 3 end exponent close parentheses squared end fraction
l equals fraction numerator 3.14 cross times open parentheses 0.5 cross times 10 to the power of negative 3 end exponent close parentheses squared cross times 10 over denominator 1.6 cross times 10 to the power of negative 6 end exponent cross times 4 end fraction
l equals 1.22 m](https://images.topperlearning.com/topper/tinymce/cache/924a5916837233ceaf35e0275f3fae5a.png)
Answered by Utkarsh Lokhande | 15 Jun, 2020, 18:34: PM
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