CUET Preparation Today
When 126 V is applied across a wire of 10 m length and 0.30 mm radius, the current density is $1.4 × 10^4\, A/m^2$. What is the resistivity of the wire? |
$1.2 × 10^3\,Ωm$ $9× 10^{-5}\,Ωm$ $9 × 10^{-4}\,Ωm$ $3 × 10^{-8}\,Ωm$ |
$9 × 10^{-4}\,Ωm$ |
The correct answer is Option (3) → $9 × 10^{-4}\,Ωm$ |
