An α particle and a β particle are projected into the same electric field. The ratio of magnitudes of forces on them is :
A
2:1
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B
1:2
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C
2:3
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D
3:2
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Solution
The correct option is A2:1 α particle has charge =+2e β particle has charge =−e Now it is given that force acting on charge Fq=Eq ∴|Fα|:|Fβ|=|+2eE|:|−eE| =2:1