00:07
So let's start with the bottom.
00:10
Here we have a parallel plate capacitor which has to add plates.
00:13
And the side is 8 centimeter.
00:18
Okay, 8 centimeter on 8 centimeter.
00:21
And the distance, they are kept at the distance of 3 .80 meter apart millimeter.
00:30
Okay.
00:31
And the potential difference is 86 volt.
00:38
Okay.
00:38
That's what is given and one slab is one slab is a pyrex glass and other is other is polysterein okay polystrain okay we have to find electrical energy stored incapacitive okay this is what we have to find so let us just start with the problem.
01:18
So slabs have put out inside this.
01:21
So we actually have to find the capacitance of these two materials.
01:29
So first let us go for capacitance of polystering.
01:35
Okay.
01:37
So c -p -o, that is what i'll be writing.
01:39
The formula of capacitance is k -absarad -0, k by d.
01:44
So see policy strain it will be we will just substitute the values okay so k is 2 .6 into 8 .85 into 10 to the power minus 12 that is upside and not value into area area will be what the square it is a square okay so area will be 8 square okay so 8 into 10t power minus 2 that is for conversion to meter and its square okay and then it is to be divided by d okay distance is it's actually d by 2.
02:17
In this case, 1 .9 into 10 to power minus 3, just hold up a second.
02:23
Okay, on each side.
02:26
Okay, i am not having the film.
02:28
Okay, the plate is completely filled two slabs each on each side.
02:34
Okay, okay.
02:35
It is like at midway kind of thing it is having this much, okay? so yeah, 1 .90 m .thick, okay? so yeah so yeah so cpo will be a capacities of pollster will be 7 .75 into 10 to power minus 11 ferrad okay so i'll just convert it into micro ferrat so this will be 77 .5 into 10tile power minus 12 okay which i can write as picofarad 7 .5 picofarad okay now let us find for a pyrx class okay pyrex so c p y will be again k epsilon knot a by d k for pyrx glasses 5 .6 and a epsilon not 10 to 10 to the power minus 12 into squares area that is 8 into 10 to the power minus 2 for conversion and then it's square okay and then thickness is 1 .9 into 10 to the power minus 3 so it comes out as 1 .6 6 into 10l power minus 12 ferrat...