Q. The ratio of specific charge of an $\alpha$-particle to that of a proton is
A) 2 :1
B) 1 :1
C) 1 :2
D) 1 :3
Explanation
(c) Specific charge $= \frac{q}{m};$ Ratio $= \frac{\left( \frac{q}{m} \right)_{\alpha}}{\left( \frac{q}{m} \right)_{p}} = \frac{q_{\alpha}}{q_{p}} \times \frac{m_{p}}{m_{\alpha}} = \frac{1}{2}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.