CUET Preparation Today
The electric field in a copper wire of cross-sectional area $4\, mm^2$ carrying a current of 1 A and having electrical conductivity of $6.25 × 10^7\, Sm^{-1}$, is |
$4 × 10^{-3}\, Vm^{-1}$ $4 × 10^{-2}\, Vm^{-1}$ $5 × 10^{-3}\, Vm^{-1}$ $0.4\, Vm^{-1}$ |
$4 × 10^{-3}\, Vm^{-1}$ |
The correct answer is Option (1) → $4 × 10^{-3}\, Vm^{-1}$ |
