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Question

Two spherical shells are as shown in figure. Suppose r is the distance of a point from their common centre. Then, match the entries of column I with the entries of column II.
ColumnIColumnII(a)Electric field for r <R1(p)is constant for q2and varying for q1.(b)Electric potential for r<R1(q)is zero for  q2and varying for q1(c)Electric potential for R1<r<R2(r)is constant(d)Electric field forR1<r<R2(s)zero


A
(a) (s); (b) (r); (c) (p); (d) (q);
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B
(a) (r); (b) (s); (c) (q); (d) (p);
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C
(a) (p); (b) (q); (c) (r); (d) (s);
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D
(a) (q); (b) (p); (c) (s); (d) (r);
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Solution

The correct option is A (a) (s); (b) (r); (c) (p); (d) (q);

r<R1E=0+0=0V=kq1R1+kq2R2= constant
R1<r<R2
E=kq1r2+0
V=kq1r+kq2R2

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