Question

The specific charge of a proton is $9.6\times {10}^{7}Ck{g}^{-1}$ The specific charge of an alpha particle will be

• A. $9.6\times {10}^{7}Ck{g}^{-1}$
• B. $19.2\times {10}^{7}Ck{g}^{-1}$
• C. $4.8\times {10}^{7}Ck{g}^{-1}$
• D. $2.4\times {10}^{7}Ck{g}^{-1}$

Answer 1

The correct option is C $4.8\times {10}^{7}Ck{g}^{-1}$

For proton,
Specific charge = $\frac{e}{m}=9.6\times {10}^{7}Ck{g}^{-1}$
For alpha particle,

Specific charge = $\frac{2e}{4m}$ =$\frac{1}{2}\frac{e}{m}$

putting value of e

$=4.8\times {10}^{7}Ck{g}^{-1}$