Which of the following has the maximum electrical resistivity?

Correct option is B

The correct answer is option (b) Glass.

Glass is an excellent electrical insulator and has a very high electrical resistivity compared to metals like Aluminium, Mercury, and alloys like Manganin.

Information Booster :

1. Aluminium:

   • A good conductor of electricity with low resistivity (~2.82 μΩ·cm).
   • Commonly used in electrical wiring, transmission lines, and as a lightweight conductor.

2. Mercury:

   • A metal with moderate electrical conductivity and resistivity (~95.8 μΩ·cm).
   • Used in switches, thermometers, and some electrical applications.

3. Glass:

   • An insulator with extremely high resistivity (ranging from $$10^{7}$$ to $$10^{14}$$​ Ω·cm).
   • Commonly used in electrical insulators, optical applications, and building materials.

4. Manganin:

   • An alloy of copper, manganese, and nickel, with resistivity (~48 μΩ·cm).
   • Known for its stable resistance and used in precision resistors and measuring instruments.

Conclusion: Glass has the highest resistivity among these materials, making it the least conductive.

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