Is a charge of `(5.8xx10^(-18))C` possible?

Work done in placing a charge of 8 xx 10^(-18) C on a capacitor of capacitance 800 microfarad is

To increase the potential of a conductor by 500 V , a charge of 5xx10^(-8)C . Is given. What is the capacitance of the conductor?

The work done in placing a charge of 8 xx 10^(-18) coulomb on a condenser of capacity 100 microfarad is .

A charged water drop of weight 4 xx 10^(-18) kg and charge 1.6 xx 10^(-19) C is stable in an electric field . What is the intensity of electric field