In a parallel plate capacitor with air between the plates, each plate has an area of `6 xx 10^(-3)m^(2)` and the distance between the plates is 3 mm.
Calculate the capacitance of the capacitor. If this capacitor is connected to a 100 V supply, what is the charge on each plate of the capacitor?

Explanation

Capacitance of capacitor with air between plates
`C_(0) = (in_(0)A)/(d)`
`= (8.854 xx10^(-12)xx6xx10^(-3))/(3xx10^(-3))`
`= 17.708 xx10^(-12)`
`:. C_(0)= 17.7xx10^(-12) F`
`C_(0) = 17.7p F = 18 p F `
Suppose the charge on each plate of capacitor
`q_(0)=C_(0)V`
`= 17.7xx10^(-12)xx100`
`= 17.7xx10^(-10) C = 1.8 xx10^(-9) C `