For a point charge, the electric field is isotropic $($its magnitude does not depend on angle$)$

and varies as $1/$r$2,$ so that twice as far away the electric field is $1/4$ as large.

$($a$)$ For an extended object, is the electric field isotropic? Explain and give an example.

$($b$)$ For an extended object, does the field vary as $1/$r$2?$ Explain, and give examples