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Electricity — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceElectricity3 Marks
Question
The electrical resistivities of five substances A, B, C, D and E are given below:$\begin{matrix}\text{B}&110\times10^{-8}\Omega\text{ m}\\\text{C}&2.60\times10^{-8}\Omega\text{ m}\\\text{D}&10.0\times10^{-8}\Omega\text{ m}\\\text{E}&1.70\times10^{-8}\Omega\text{ m}\end{matrix}$
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Answer

  1. E is best conductor of electricity due to its least electrical resistivity.
  2. C, because its resistivity is lesser than that of A.
  3. B, because it has the highest electrical resistivity.
  4. C and E, because of their low electrical resistivities.

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