Magnetic field due to currentVery Hard
Question
A particle having charge q enters a region of uniform magnetic field 
(directed inwards) and is deflected a distance x after traveling a distance y. The magnitude of the momentum of the particle is
(directed inwards) and is deflected a distance x after traveling a distance y. The magnitude of the momentum of the particle isOptions
A.
B.
C.
D.
Solution
Radius , R = 
⇒ mv = qBR
where R sinθ = y ; R (1 - cos θ) = x
⇒ R =
∴ mv =
⇒ mv = qBRwhere R sinθ = y ; R (1 - cos θ) = x
⇒ R =
∴ mv =
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