00:01
Here in a question, paddler plate circular capacitor is separated by a distance 5mm with a dielectric constant of 2 .2 and electric field between them is equals to 3 into 10 to the power 4 volt per meter and we have to find charged density which we denote by sigma which we denote by sigma.
00:28
So, by formula of electric field between the plates of capacitor, which is equal to e, equals to sigma divided by k, epsilon, where is electric field and sigma is char density, and k is the electric constant, and epsilon not is, epsilon not is electric constant.
00:54
So, if we interchange this, if we interchange this, we get sigma is equal to k e epsilon naught.
01:05
So if we put the value, we get here, sigma is equals to value of k's, value of k is 2 .2, value of k's 2 .2, multiply here electric field is 3 into 10 to the power, 4, and value of epsilon knot is 8 .85 multiplied 10 to the power minus 12...