# Which is true about an electron-(a). rest mass of electron is 9.1xx10^(-28)g(b). mass of electron increases with the increase in velocity(c). molar

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Which is true about an electron-
(a). rest mass of electron is 9.1xx10^(-28)g
(b). mass of electron increases with the increase in velocity
(c). molar mass of electron is 5.48xx10^(-4)g//"mole"
(d). e//m of electron is 1.7xx10^(8) "coulomb"//g
A. Rest mass of electron is 9.1 xx10^(-28)g
B. Mass of electron increases with the increase in velocity
C. Molar mass of electron is 5.48xx10^(-4) g/mole
D. e/m of electron is 1.7xx10^(8) coulomb/g

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(b) As energy also has mass ,so K.E of e^(-) uarr ,"mass" uarr
(c ) molar mass =6.023 xx10^(23)xx9.1xx10^(-28) g / mole
(d) e//m =(1.6xx10^(-19))/(9.1xx10^(-28)) c//g