Question

Two separate charges q and 10q are placed inside two different spheres. In which case, the electric flux will be greater?

(a) Flux will be same in both the cases

(b) 1^st sphere

(c) 2^nd sphere

(d) No flux in any of the spheres

I have been asked this question in a national level competition.

My question is based upon Electric Flux in portion Charges and Fields of Physics – Class 12

Answer 1

Right option is (c) 2^nd sphere

For explanation I would say: The electric field line is directly proportional to the charge bound inside a sphere. We know that, field lines are the measure of electric flux i.e. number of field lines crossing through a surface are know an electric flux. Therefore flux will be lesser in the case of q charge and will be 10 times in case of a 10q charge.