A sphere of mass m and radius R_(2) has a concentric cavity of radius R_(1), The force exerted by the sphere on a particle of unit mass located at a distance r from the centre varies as (O le r le oo)

A sphere of mass m and radius R_(2) has a concentric cavity of radius

1.	A sphere of mass m and radius R_(2) has a concentric cavity of radius R_(1), The force exerted by the sphere on a particle of unit mass located at a distance r from the centre varies as (O le r le oo)
Answer» ANSWER :C