Question

two spheres have their radius in the ratio 1:2; compare the surface density of charge if the ratio of charge on them is 1:2

Answer 1

Answer: it is equal to the square of their radii

Explanation:

R:r = 1:2

we know that surface density charge = charge/ surface area

so lets assume the charges of the bodies are same Q

lets find out the surface charge density.....

(Q/4*22/7*R*R)/(Q/4*22/7*r*r) = sphere with radius R / sphere with radius r

r*r/R*R=sphere with R/ sphere with r

hence the ratio is equal to the square of their radii that is

r*r:R*R