An electron enters between two horizontal plates separated by 2 mm and having a potential difference of 1000 V. The force on electron is

Question

An electron enters between two horizontal plates separated by 2 mm and having a potential difference of 1000 V. The force on electron is (A) 8 × 10-12 N (B) 8 × 10-14 N (C) 8 × 10-9 N (D) 8 × 1014 N

Tardigrade Admin · Accepted Answer

Force on electron, F=Q E=Q((V/d)) ⇒ F=(1.6 × 10-19)((1000/2 × 10-3)) =8 × 10-14 N

Q. An electron enters between two horizontal plates separated by $2 mm$ and having a potential difference of $1000 V$ . The force on electron is

$8 \times 1 0^{- 12} N$

$8 \times 1 0^{- 14} N$

$8 \times 1 0^{- 9} N$

$8 \times 1 0^{14} N$

Force on electron, $F = QE = Q (\frac{V}{d})$
$\Rightarrow F = (1.6 \times 1 0^{- 19}) (\frac{1000}{2 \times 1 0 ^{- 3}})$
$= 8 \times 1 0^{- 14} N$

Q. An electron enters between two horizontal plates separated by 2mm and having a potential difference of 1000V. The force on electron is

8×10−12N

8×10−14N

8×10−9N

8×1014N