NEET Class neet Answered
The concentric spheres are of radii r1 and r2. The outer sphere is given a charge q. The charge q' on the inner sphere will be (inner sphere is grounded):
Asked by harinderamit1234 | 29 Jun, 2019, 05:16: PM
Expert Answer
If q' is the charge of inner sphere which is earthed, this inner sphere charge q' will induce a charge -q'
in inner surface of outer sphere and +q' on outer surface. Net charge on outer sphere is q.
Potential of inner sphere is due to its own charge q' and due to net charge on outer sphere.
Since potential of inner sphere is zero due to earthing, we have, 
Answered by Thiyagarajan K | 30 Jun, 2019, 12:44: PM
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