Question

The work done in moving an alpha particle between two points having potential difference $ 25\, Volt $ is

• A. $ 8\times {{10}^{-18}}J $
• B. $ 8\times {{10}^{-19}}J $
• C. $ 8\times {{10}^{-20}}J $
• D. $ 8\times {{10}^{-16}}J $
• E. $ 4\times {{10}^{-18}}J $

Answer 1

Answer: (A)

Required work done,
$ W=QV $ $ =(2e)\times 25 $
$ =50\,e=50\times 1.6\times {{10}^{-19}} $
$ =8\times {{10}^{-18}}J $