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Electricity — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceElectricity1 Mark
MCQ
Electrical resistivity of a given metallic wire depends upon.
  • A
    Its length.
  • B
    Its thickness.
  • C
    Its shape.
  • ✓
    Nature of the material.
✓

Answer

Correct option: D.
Nature of the material.
Electrical resistivity of a given metallic wire depends on number density of free electrons in the conductor which is the nature of material, i.e. $,\text{p}\propto\frac{1}{\text{n}},\text{n}=$ number of free electrons per unit volume. It also depends on the temperature of conductor.

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