MagnetismHard
Question
A particle of mass m and charge q is thrown origin at t = 0 with velocity 2î + 3ĵ + 4
units in a region with uniform magnetic field 2î units. After time t = 
, an electric file 
is switched on, such that particle moves on a straight line with constant speed.may 
be
units in a region with uniform magnetic field 2î units. After time t = , an electric file is switched on, such that particle moves on a straight line with constant speed.may be Options
A.- 8ĵ + 6units
units B.- 6ĵ - 9units
units C.- 12ĵ + 9units
units D.8ĵ - 6units
units Solution
At t = 
= 2î - 2ĵ - 4
; For net to be zero force to be zero
= 0 ⇒
= - 
= - 8ĵ + 6
= 2î - 2ĵ - 4; For net to be zero force to be zero = 0 ⇒ = - = - 8ĵ + 6 Create a free account to view solution
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