00:01
A capacitor with plates separated a distance initially of 0 .0180 meters has a potential difference of 7 .5 volts and an initial charge of 8 nanoculomes, which would be 8 times 10 to the negative 9 coulombs.
00:23
When the plates are then separated a distance of 0 .036 meter.
00:31
So look what's happening.
00:33
The distance between the plates is being doubled, and we want to know how that is going to affect charge.
00:39
So you actually don't have much math that you have to do here.
00:42
It's more looking at the concepts of the equation.
00:46
And so the capacitance equation is capacitance is equal to the permeability in a vacuum, times the area of the plates divided by the distance between the plates.
00:56
So our distance has increased by two.
01:01
And so if the denominator increases by two, our answer is going to decrease by two.
01:09
So our capacitance will decrease by a factor of two when the distance is increased.
01:15
Because there's no squared here, it's going to be the exact same amount...