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Questions  

Two identical particles having the same mass m and charges+q and -q separated by a distance d enter a uniform magnetic field B directed perpendicular to paper inwards with speeds v1 and v2 as shown in figure. The particles will not collide if

a
d>mBqv1+v2
b
d
c
d>2mBqv1+v2
d
v1=v2

detailed solution

Correct option is C

The particles will not collide if d>2r1+r2  or   d>2mv1Bq+mv2Bq   or   d>2mBqv1+v2

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