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Two wires one of manganin and the other of copper have equal length and equal resistance. Which one of these wires will be thicker? |
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Answer» Resistance \(R=\frac{pl}{A}=\frac{pl}{\pi r^2}\) Resistivity ρ of manganin is much greater than that of copper, therefore to keep same resistance for same length of wire, the manganin wire must be thicker. |
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