Magnetic field due to currentHard
Question
A charged particle moves in a magnetic field 
= 10î with initial velocity 
= 5i + 4ĵ .
The path of the particle will be
= 10î with initial velocity = 5i + 4ĵ . The path of the particle will be
Options
A.straight line
B.circle
C.helical
D.None
Solution
Magnetic force acts normal to velocity and hence KE does not change but momentum changes.
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