A) \[{{v}_{1}}>{{v}_{2}}>{{v}_{3}}>{{v}_{4}}\]
B) \[{{v}_{1}}<{{v}_{2}}<{{v}_{3}}<{{v}_{4}}\]
C) \[{{v}_{1}}={{v}_{2}}={{v}_{3}}={{v}_{4}}\]
D) \[{{v}_{1}}<<{{v}_{2}}>{{v}_{3}}<{{v}_{4}}\]
Correct Answer: A
Solution :
\[\because \ x\propto \frac{1}{{{v}^{2}}}.\]The ion whose deflection is less, its velocity will be more. From the curve \[{{x}_{1}}<{{x}_{2}}<{{x}_{3}}<{{x}_{4}}\], therefore \[{{v}_{1}}>{{v}_{2}}>{{v}_{3}}>{{v}_{4}}\].
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