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Q.

Two protons move parallel to each other keeping distance r between them, both moving with same velocity V, then the ratio of the electric and magnetic force of interaction between them is,

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a

C2V2

b

2C2V2

c

C22V2

d

C2V2

answer is A.

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Detailed Solution

Electric force,  Fe=14πεoq1q2r2=14πεoq2r2 ..............(1)Magnetic force,  Fm=qVB=qVμo4πVqr2 .................(2) (1)(2) gives, FeFm=C2V2     ∵C2=1μoε0
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