A beam of mixture of α particles and protons are accelerated through same potential difference before entering into the magnetic field of strength B. If r1=5 cm, then r2 is
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a
5 cm
b
52 cm
c
102 cm
d
20 cm
answer is B.
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Detailed Solution
r=mvqB=2mEqB=2mqVqB=mq×2VB⇒ r2r1=41×12=2⇒r2=2r1=52 cm