Question

The work done in moving a alpha particle upto 25 p.d will be

Answer 1

We know that work done = charge x Potential difference,

Now charge of an alpha particle = 2e= 2 x 1.6 x 10^-19,

where e= charge of an electron

Hence Work done,

= 2 x 1.6 x 10^-19 x 25

= 8 x 10^-18

Answer 2

"Given:

Particle voltage or Potential Difference = 25 V

Solution:

Concept: “Work done relating potential difference is given as follows”

$Work\quad done = charge \times Potential \quad difference;$

Charge of an alpha particle can be estimated as:

$Charge (e) = 2e = 2 \times 1.6 \times 10^ {-19}$

$= 3.2 \times 10^ {-19}$

And the work done will be,

$Work\quad done\quad =\quad 3.2 \times 25 \times 10^ {-19}$

$Work\quad done\quad =\quad 8 \times 10^ {-18}\quad J$"