Question

What is the current flowing through a conductor if 1 million electrons are crossing in 1 milisecond through its cross section.

• A. 1.6A
• B. $2\times {10}^{6}A$
• C. $1.6\times {10}^{-6}A$
• D. $1.6\times {10}^{-10}A$

Answer 1

Answer: (D)

$1.6\times {10}^{-10}A$

Number of electrons $n={10}^6$

Time of observation $t={10}^{-3}$ s

$\therefore$ Current $I=\frac{nq}{t}=\frac{{10}^6\times 1.6\times {10}^{-19}}{{10}^{-3}}=1.6\times {10}^{-10}$ A