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A point charge +Q is placed at the centre
of an uncharged spherical conducting shell of inner radius
a and outer radius b as shown in Fig. 2.51.
Fig.
53
b.
~
1. Find the electric field for r <a.
2. What is the magnitude and sign of the induced charge q'
on the inner shell surface?
3. What is the field for a <r <b?

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