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Whodiscoveredthe ratioof chargeto mass of electon and how ?Expalinwithdiagram |
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Answer» SOLUTION :Valueof `e//m_(C ) : `in1897 J.J.Thomsonmeasuredthe ratioof electrical charge(e ) tothe massofelectron`e//m_(c ) = 1.758820 xx10^(11)C KG^(-1) (equ 2.1)` Where`m_(e ) = ` mass ofthe electronin kg the electronin coloumb  Expeiment- Dterminationmethodof `e//m_(e ) :`thomsonusedcathoderay tube toget the valueof `e//m_(s )`Thomsonappliedelectricalandmagneticfieldperpendicularto EACHOTHER on the pathelectron Observation : When onlyelectricfieldappliedthe electronsthedeviate from theirpath andand hitthecathoderayat point A.Simillarywhenonlymagneticfieldisapplied electronsirlkesthe cathoderaypoint C. bycarefullybalancingthe electricaladn magneticfieldstrengthit ispossibleto bringscreenat point B Bycrryingaccuratemeasurementsthomson wasable thdeterminethe valueof `e//m_(e )` |
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