Question
Download Solution PDFIdentify the conductor having the highest resistivity.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is option 1 i.e Mercury.
- The resistivity of a material is the resistance of a wire of that material of unit length and unit cross-sectional area.
- Resistivity, commonly symbolized by the letter ρ (rho).
- The unit for resistivity is the ohm-meter.
- The resistivity of a material depends on its nature and the temperature of the conductor, but not on its shape and size
- Materials that conduct electrical current easily are called conductors and have a low resistivity.
- Materials that do not conduct electricity easily are called insulators and these materials have a high resistivity.
| Metal | Resistivity |
|---|---|
| Silver | 1.59×10−8 |
| Copper | 1.68×10−8 |
| Gold | 2.44×10−8 |
| Aluminium | 2.65×10−8 |
| Zinc | 5.90×10−8 |
| Cobalt | 6.24×10−8 |
| Nickel | 6.99×10−8 |
| Iron | 9.70×10−8 |
| Mercury | 9.80×10−7 |
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