Two wires one of manganin and the other of copper have equal length an

1.	Two wires one of manganin and the other of copper have equal length and equal resistance. Which one of these wires will be thicker?
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.

Two wires one of manganin and the other of copper have equal length and equal resistance. Which one of these wires will be thicker?

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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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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