MCQ
Dimensional formula of resistivity is
- A$\left[ {M{L^2}{A^{ - 2}}{T^{ - 3}}} \right]$
- ✓$\left[ {M{L^3}{A^{ - 2}}{T^{ - 3}}} \right]$
- C$\left[ {ML{A^{ - 2}}{T^{ - 3}}} \right]$
- D$\left[ {M{L^3}{A^{ - 1}}{T^{ - 3}}} \right]$
✓
Answer
Correct option: B.
$\left[ {M{L^3}{A^{ - 2}}{T^{ - 3}}} \right]$
b
Resistivity $=\frac{\text { Resistance } \times \text { Area }}{\text { Length }}$
Resistivity $=\frac{\text { Resistance } \times \text { Area }}{\text { Length }}$
$=\frac{M L^{2} T^{-3} A^{-2} \times L^{2}}{L}=\left[M L^{3} T^{-3} A^{-2}\right]$
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