Question

A copper wire of a length 1.0m has resistivity 1.08×10^-8 ohm meter if the wire is cut into two pieces then what will be the resistivity of each piece

Answer 1

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Answer 2

Given that,

Length of a copper wire, l = 1 m

Resistivity of copper wire, $\rho=1.08\times 10^{-8}\ \Omega-m$

To find,

The resistivity of each wire, if it is divided into two pieces.

Solution,

• Resistivity of a wire is its internal property. It remains same under every condition.
• Resistance of wire in terms of its resistivity is given by :

$R=\dfrac{\rho l}{A}$

• If the wire is cut into two pieces, then its resistivity do not change. It will remain the same.

Learn more,

Resistivity

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