e/m for an electron is _, when the charge of an electron is 1.6 x 10^-19C and mass of electron is 9.1 x 10^-31kg.
Correct answer: B. 1.76 x 10^11 C/kg
- A. 1.67 x 10^-11 C/kg
- B. 1.76 x 10^11 C/kg
- C. 16.7 x 10^11 C/kg
- D. 1.76 x 10^-11 C/kg
Explanation
The specific charge is being asked here. The formula for that is:Q/m {where Q is the charge of the electron and m is the mass.}Substitute Q= 1.6x10-19 and m=9.1x10-31 into the equation:=1.6x10-19/9.1x10-31= 1.76x1011
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