Question

The potential difference between two plates separated by $1mm$ is $1000V$. The force on an electron placed between the plates is

• A. $1.6\times {10}^{-13}N$
• B. $1.6\times {10}^{-19}N$
• C. $1.6\times {10}^{-14}N$
• D. $1.6\times {10}^{-10}N$

Answer 1

The correct option is A $1.6\times {10}^{-13}N$

given $V=1000V$
$d=1mm$
We know $E=\frac{v}{d}$

$=\frac{1000}{1\times {10}^{-3}}$

$E=10\times {10}^5$

Force $=qE$
$={10}^6\times 1.6\times {10}^{-19}$
$F=1.6\times {10}^{-13}N$