Question

Is it possible ever for a silver wire to have a higher resistance than an iron wire? Comment on your reply.​

Answer 1

Answer:

Length = 7.5 cm

Explanation:

In the question,

Length of the Iron wire = 12 cm

Resistance of Iron wire = Resistance of Silver Wire

Also,

Area of cross section, A of Iron wire = Area of cross section of Silver wire

Resistivity of Iron = 10 x 10⁻⁸ Ωm

Resistivity of Silver = 16 x 10⁻⁸ Ωm  

Resistance= p (l/ A)

So,

We know that the Resistance of the wire is given by,

So,

Therefore, the length of the Silver wire is 7.5 cm.

Answer 2

Answer:

Table of resistivity for common materials

Table of Electrical Resistivity for Common Materials

Material Electrical Resistivity at 20°C Ohm metres

Quartz 7 x 1017

Silicon 6.4 x 102

Silver 1.6 x 10-8

Explanation:

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