00:01
Here one non -conducting solid sphere is there.
00:05
So, for non -conducting solid sphere, let us say the solid sphere is this and the radius of the solid sphere let us say capital r.
00:31
So, electric field let us say at point p which is placed or we can say which is situated at the distance of small r let us say ep, it is given by the formula 1 by 4 pi epsilon naught q by r cube into small r, where q is the charge.
01:01
So, let us say here the charge density, charge density h sigma which is the volume charge density equal to we can say it is small q by 4 by 3 pi r cube that means, we can say q equal to 4 by 3 sigma pi r cube.
01:35
So, it is given in the question that electric field, electric field at the distance small r equal to 1 .73 centimetre is how much? 10 newton per coulomb and capital r the radius of the solid sphere is given as 11 centimetre.
02:04
So, what we can write from here? so, electric field at the distance, electric field at r equal to 1 .73 centimetre equal to what we can write? it is 1 by 4 pi epsilon naught, it is q that means, we can write 4 by 3 pi sigma and it is r cube by we can say r cube into r 1 .73 into 10 to the power minus 2, we can write like this...