Physics 122 Chapter 26- Practice.doc

Physics122Chapter26-Practice1-Aballofmassm==+32μC,=28°,whatisthemagnitudeoftheelectricfield?(g=).2-Asemi--axisdirectionatthepointP,1meterawayfromthetipoftherod.(Usethegivenintegralifneeded)3-Chargeisuniformlydistributedaroundaringofradius10cmandtheelectricfieldEismeasuredalongthering'scentralaxis('scenteristhemagnitudeofEmaximized?4-Aninkdropletofmassmandchargeqisinjectedhorizontallywithaninitiallyvelocityv0intoaregionwithanelectricfieldEwhichisperpendiculartov0,andthenhitsapieceofpaperadistancedawayfromtheinjectionpoint.(a)Isthechargenegativeorpositive?(b)Whatistheverticaldeflectionyofthedroplet?(Ignoregravitationalforce)5->>d.(Themagnitudeoftheelectricfieldcreatedbyadipoleofchargeqandseparationdatapointlocatedadistancer(fromthecenterofthedipole)alongthedipolemomentisgivenbyE=2kqd/r3)Solution:1-Therearethreeforcesactingupontheballthegravitationalforcemg,theelectrostaticforceqE,andtheten