Magnetic field due to currentHard
Question
Two particles of charges + Q and -Q are projected from the same point with a velocity v in a region of uniform magnetic field B such that the velocity vector makes an angle θ with the magnetic field. Their masses are M and 2M, respectively. Then, they will meet again for the first time at a point whose distance from the point of projection is
Options
A.
B.
C.
D.
Solution
T1 = 
= T0
T2 =
= 2T0
They will meet at time 2T0.
∴ Distance from origin = vcosθ × 2T0 =
= T0T2 =
= 2T0They will meet at time 2T0.
∴ Distance from origin = vcosθ × 2T0 =
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