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Two spherical shells are as shown in fig...

Two spherical shells are as shown in figure. Suppose r is the distance of a point from their common centre. Then,
electric field and electrical potential by both shells

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The correct Answer is:
A, B, C, D
A – RS, B – R, C – P, D – PQ
`E{{:(0 , for ,r lt r_1), ((kq1)/r , for , R_1 lt r lt R_2):}` , `V= {{:((kq1)/R_1+(kq_2)/R_2 for r lt R_1),((kq_1)/r+ (kq2)/R_2 for R_1 lt r lt R_2):}`
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