Question
Download Solution PDFWhat is the correct sequence of resistivity of silver, nichrome and glass at room temperature?
This question was previously asked in
CDS 01/2022: GK Previous Paper (Held On 10 April 2022)
Answer (Detailed Solution Below)
Option 1 : Silver < Nichrome < Glass
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UPSC CDS 01/2025 General Knowledge Full Mock Test
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Detailed Solution
Download Solution PDFCONCEPT:
- Electrical Resistivity(ρ) is a fundamental and intrinsic property of any material that measures how strongly that material can resist the flow of electric current through it.
- SI unit of ρ is Ohm-metre (Ω m)
- It is the reciprocal of Electrical Conductivity.
| Material | Resistivity (Ω m) |
| Silver | 1.59 x 10-8 |
| Nichrome | 100 x 10-8 |
| Glass | 9 x 1010 |
EXPLANATION:
- From the table, it is clear that the resistivity of glass is much more than that of Nichrome and Silver.
- Between these two Nichrome has more resistivity than Silver.
- Hence, Silver < Nichrome < Glass is the correct sequence.
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