Calculate the ratio of the resistivity of 2 wires having the same length and same resistance with an area of cross-section and respectively.

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Ankit LalLv10

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An experiment is conducted to measure the electrical resistivity of Nichrome in the form of wires with different lengths and cross-sectional areas. For one set of measurements, astudent uses 30-gauge wire , which has a cross-sectional area of The student measures the potential difference across the wire and the current in the wire with a voltmeter and an ammeter, respectively.

(a) For each of the measurements given in the following table taken on wires of three different lengths, calculate the resistance of the wires and the corresponding value of the resistivity.

(b) What is the average value of the resistivity?

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Calculate the ratio of the resistivity of 2 wires having the same length and same resistance with an area of cross-section and respectively.

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Physics: Principles with Applications

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