Question

The specific charge of a proton is $9.6\times {10}^{7}C$ $k{g}^{-1}$, then for $\alpha$-particle it will be:

• A. $2.4\times {10}^{7}C$ $k{g}^{-1}$
• B. $4.8\times {10}^{7}C$ $k{g}^{-1}$
• C. $19.2\times {10}^{7}C$ $k{g}^{-1}$
• D. $38.4\times {10}^{7}C$ $k{g}^{-1}$

Answer 1

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

As we know,

specific charge of alpha particles $=$ specific charge of proton $\times 2/4=4.8\times {10}^{7}C$ $k{g}^{-1}$

Hence, the correct answer is (B)