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Question

Velocity ratio of the two cathode rays is 1:2. They are applied to the same electric field. What is the deflection ratio of the two cathode rays

A
1 : 2
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B
1 : 4
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C
4 : 1
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D
8: 1
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Solution

The correct option is C 4 : 1
Given: velocity ratio =1:2 ,same electric field
Solution: Motion of charged particle in electric field:
By using the formula :y=12×qEx2mv2
y1v2
y1y2=41
Hence the correct answer is C

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