Question

3×10¹⁷ electrons cross in 30 seconds through an area .What is the electric current ?

Answer 1

The answer is in the attachment.

Answer 2

Answer:

Given number of electrons = 3 x 10¹⁷

Charge on one electron = 1.6 x 10 ~¹⁹

Total charge (Q) = 3 x 10¹⁷ x 1.6 x 10~¹⁹

Time = 30 second

Current (I) =

$\frac{charge}{time}$

$= \frac{3 \times {10}^{17} \times 1.6 \times {10}^{ - 19} }{30}$

=

$1.6 \times {10}^{ - 3}$

I = 1.6 mA