1.

The mass of an electron is `9.11 x 10^-31` kg, that of a proton is `1.67 x 10^-27` kg. Find the ratio `F_e// F_g` of the electric force and the gravitational force exerted by the proton on the electron.-

Answer» Correct Answer - A::B::C
`F_e=1/(4piepsilon_0)(q_1q_2)/r^2`
`and F_g=G(m_1m_2)/r^2`
`:. F_e/F_g=((1//4piepsilon_0)q_1q_2)/(Gm_1m_2)`
`=((9xx10^+9)(1.6xx0^-19)^2)/((6.67xx10^-11)(9.11xx10^-31)(1.67xx10^-27))`
`=2.27xx10^39`


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