4.)(a) What is the resistance of a Nichrome wire at 0 °C if its resistance is 100 ? at11.5 °C? The temperature coefficient of resistivity for Nichrome is 0.0004/°C.(b) What is the temperature coefficient of resistivity of carbon if a carbon rod hasresistances of 0.0160 ? at 0 °C and 0.0158 ? at 25.8 °C?
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SOLVED: A student is investigating how the resistance of wire depends on the diameter of the wire. The circuit is set up as shown in Fig: 1.1.ohmmeterwireFig: 1.1The resistance R of the wire is measured using an ohmmeter. The experiment is repeated for wires of the same material and same length L but different diameter d. It is suggested that R and d are related by the equation: 4pL * d^2, where p is a constant.A graph is plotted of R on the y-axis against d on the x-axis. Determine an expressio
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