Identify the conductor having the highest resistivity.

Identify the conductor having the highest resistivity.
| Identify the conductor having the highest resistivity.

A. Mercury

B. Silver

C. Aluminium

D. Copper

Please scroll down to see the correct answer and solution guide.

Right Answer is: A

SOLUTION

The 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.
Resistivity of various materials at 20 °C
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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