Material Classification | MCQs
قدرتی ربڑ کو کس قسم کے مواد کی درجہ بندی کی جاتی ہے؟
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A. Elastomer
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B. Thermoset
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C. Ceramic
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D. None of these
Explanation
Natural rubber is classified as an elastomer, a type of polymer that can stretch and return to its original shape.
Elastomers are known for their elasticity and flexibility, making rubber ideal for tires, seals, and gloves.
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A. Semiconductor
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B. Insulator
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C. Conductor
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D. Superconductor
Explanation
Resistivity is a measure of how strongly a material opposes the flow of electric current.
Here's a general classification based on resistivity (in Ω-cm):
| Material Type | Resistivity Range (Ω-cm) |
|---|
| Conductors | to |
| Semiconductors | to 10^4
|
| Insulators | to to 10^9101810^{18}
|
| Superconductors | ≈ 0 (below critical temperature) |
So, if a material has resistivity between 10^5 and 10 ^9 Ω-cm, it is classified as an insulator because it resists the flow of electric current very strongly.
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