a wire of radius 0.42 m m and resistivity 44 multiple by 10 power -8 ohm m is available in a lab calculate the length of the wire needed to have resistance of n5 ohm (answer should be 18.9 m)
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Answer:
1.71272 is the correct answer
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Explanation:
this is easy to solve first find the area of the coil
then find out the length of the wire using the formula used in the photo
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