A charged particle of mass m and charge q is projected into a uniform magnetic field of induction B with speed v which is perpendicular to B. The width of the magnetic field is d. The impulse imparted to the particle by the field is (d << 
):
A
qBv
B
C
qBd
D
Text Solution
Verified by ExpertsThe correct answer is:
C
As d < < < 
d = r sin θ
Impulse is change in momentum
sin θ = 
where r = 
d < < < r ∴ sin θ = θ θ = 
Change in momentum = mv θ = mv × 
= 
Impulse = qBd
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