A. The electric field near the surface of the earth points downward and has a ma
ID: 1406647 • Letter: A
Question
A. The electric field near the surface of the earth points downward and has a magnitude of 120 N/C. Compare the upward electric force on an electron with the downward gravitational force; i.e., what is the ratio Fe Fg ? The elementary charge is 1.6 × 1019 C and the mass of an electron is 9.11 × 1031 kg.
B. The electric field near the surface of the earth points downward and has a magnitude of 120 N/C. Compare the upward electric force on an electron with the downward gravitational force; i.e., what is the ratio Fe Fg ? The elementary charge is 1.6 × 1019 C and the mass of an electron is 9.11 × 1031 kg.
I need an answer for part B only! thanks!
Explanation / Answer
Ratio= Fe/Fg = eE/mg = [(1.6*10^-19)*120]/[9.11*10^-31*9.8]=2.15*10^12
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