Question

A strip of silicone of area 800nm carries a current of 190 Ma calculate current density

Answer 1

Solution

Current density is given by

$\rho =\frac {I}{A}$

Putting the value of current and area

$\rho =\frac {190\times 10^6}{800\times10^{-9}}$

$\rho=2.375\times10^{14} A/m^2$