A) 1 : 4
B) 1: 2
C) 4: 1
D) 2 : 1
Correct Answer: D
Solution :
Ratio of specific charge of a proton and\[\alpha -\]particle is \[=\frac{e/{{m}_{p}}}{2e/4{{m}_{p}}}\] \[=\frac{2e/{{m}_{p}}}{e/{{m}_{p}}}=\frac{2}{1}\]
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