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If mass of the electron = 9.1 xx 10^(–31...

If mass of the electron = `9.1 xx 10^(–31)` Kg. Charge on the electron `= 1.6 xx 10^(–19)` coulomb and `g = 9.8 m//s^(2)`. Then the intensity of the electric field required to balance the weight of an electron is-

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