What is the correct sequence of resistivity of silver, nichrome and glass at room temperature ?
[amp_mcq option1=”Silver < Nichrome < Glass" option2="Glass < Nichrome < Silver" option3="Silver < Glass < Nichrome" option4="Nichrome < Silver < Glass" correct="option1"]
This question was previously asked in
UPSC CDS-1 – 2022
Resistivity is an intrinsic property of a material that quantifies how strongly it opposes the flow of electric current. Materials are classified as conductors, semiconductors, or insulators based on their resistivity values.
Good electrical conductors have very low resistivity. Metals like silver are excellent conductors. Alloys like nichrome are generally poorer conductors than pure metals and have higher resistivity. Insulators have very high resistivity, effectively preventing current flow. Glass is a good insulator. Therefore, the correct order of resistivity from lowest to highest is Silver (conductor) < Nichrome (alloy) < Glass (insulator).