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Question: The ratio of specific charge of an \(\alpha\) -particle to that of a proton is...

The ratio of specific charge of an α\alpha -particle to that of a proton is

A

2 : 1

B

1 : 1

C

1 : 2

D

1 : 3

Answer

1 : 2

Explanation

Solution

Specific charge =qm= \frac{q}{m}; Ratio =(q/m)α(q/m)p=qαqp×mpmα=12= \frac{(q/m)_{\alpha}}{(q/m)_{p}} = \frac{q_{\alpha}}{q_{p}} \times \frac{m_{p}}{m_{\alpha}} = \frac{1}{2}