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Question

An electron and a proton having equal momentum enter in a uniform magnetic field normal to the field lines. If the radii of their circular paths be re and rp respectively, then

A
rerp=memp
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B
rerp=memp

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C
rerp=mpme
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D
rerp=11
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Solution

The correct option is D rerp=11
r=mvqB,where mv Momentum (P)
r=PqB
Since both electron and proton havesame charge and momentum
rerp=11

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