1.

If a stationary charged particle experience an electromagnetic force then _____ .

Answer»

E = 0, B = 0
`Ene0,B=0orBne0`
`Ene0,BNE0`
`vecE_|_vecB`

Solution :ELECTROMAGNETIC force (or Lorentz force)
`F=F_(e)+F_(m)`
INITIALLY (at t = 0) `Fne0` but `F_(m)=0`
`(becausev=0)rArrF_(e)ne0rArrEne0`
When `tgt0,Fne0`
`rArrF_(e)+F_(m)ne0`
Here `F_(e)ne0rArrF_(m)=0orF_(m)ne0`
`rArrB=0orBne0`
`RARR` Option (B) is correct.


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