In a region 10^ 19 - particels and 10^ 19 protons per second move… - Vidyadip

MCQ

In a region $10^{19}$ $\alpha -$ particels and $10^{19}$ protons per second move to the left, while $10^{19}$ electrons moves to the right per second. The current is

A
$3.2\,A$ towards left
B
$3.2\,A$ towards right
✓
$6.4\,A$ towards left
D
$6.4\,A$ towards right

✓

Answer

Correct option: C.

$6.4\,A$ towards left

c
Current due to protons and $\alpha$ -particles is towards left and as ${e^ - }$ have $-$ ive charge, so current due to electrons is also towards left

$\therefore $ total current $\mathrm{I}=(2 \mathrm{e}+\mathrm{e}+\mathrm{e}) \times 10^{19}$

${=4 \times 1.6 \times 10^{-19} \times 10^{19}} $

${=6.4 \mathrm{\,A}}$

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