An `alpha`-particle is in electric field of `15 xx 10^4` V/m So, the force experienced by it is......N.

Options

A. (A) `4.8 xx 10^(-12)`
B. (B) `4.8 xx 10^(-13)`
C. (C) `4.8 xx 10^(-14)`
D. (D) `4.8 xx 10^(-18)`

Answer

C

Explanation

`F=qE`
`=(2e)E` (`therefore` For `alpha`-particle, q=2e)
`=2 xx 1.6 xx 10^(-19) xx 15 xx 10^(4) (therefore e=1.6 xx 10^(-19)C)`
`=4.8 xx 10^(-14)` N