An unknown length of 25 mm² silver has a resistance of 0.053 Ω and a resistivity of 1.59E-8 Ω/m² what is the length in metres?
- 82 m
- 168 m
- 84 m
- 42 m
Select your answer and then check it
- \( Resistance (Ω) = \frac{Resistivity (Ω/m^3) \times Length (m)}{Area (m^2)} \)
- \( Length (m) = \frac{0.053 (Ω/m^3) \times 2.5E-5 m^2}{1.59E-8 (Ω/m^3)} \)