Question

A silver wire of 1 mm diameter has a charge of 90 coulombs flowing in 1 hours and 15 minutes. Silver contains

Answer 1

1 hour 15 minutes=4500 seconds

$i=\frac{q}{t}$

$i=\frac{90}{4500}=0.02$ amperes

$j=\frac{i}{a}$

$j=\frac{0.02}{(3.14\times 0.05\times 0.05)}$

$j=2.55\times {10}^4$ $amp/m^2$

drift velocity=$\frac{j}{ne}$

$v\left(d\right)=\frac{2.55\times 1000}{5.28\times {10}^{22}\times 1.6\times 10-19}$

$v\left(d\right)=2.69\times {10}^{-7}$