Consider two concentric conducting spherical shells with inner and outer radii a, b and c, d as shown in the figure. Both the shells are given Q amount of positive charges. 7. The electric field in different regions are : la) Ē = 0 for r d CAREER ENDEAVOUR (b) Ē =- -î for rd (c) =- î for r

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Chapter7: Electric Potential
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Problem 72P: The practical limit to all electric field in air is about 3.00106 N/C. Above this strength, sparking...
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Common data for Q. 7 and Q. 8.
Consider two concentric conducting spherical shells with inner and outer radii a, b and c, d as shown in
the figure. Both the shells are given Q amount of positive charges.
7.
The electric field in different regions are :
la) Ē = 0 for r<a; =-
for a <r<b: E=0 for b<r<c; E
4 TE,r
-f for r>d
CAREER ENDEAVOUR
-f for r<a; E=0 for ar<bar4TEr
for ber<e:E=
zî for r<d
(b) Ē =–
4περ
-î for r< a; E = 0 for a <r<b;
‚Ē = 0 b<r<c;Ë =
2Q
-î for r>d
(c) =-
4περ
(d) E = 0 for r>a; = 0 for a <r<b; =-
Q
zî for b<r<c; =.
î for r>d
4TE,r?
2Q
8.
In order to have equal surface charge densities on the outer surfaces of both the shells, the following
conditions should be satisfied
(a) d = 4b and c = 2a
(b) d= 2b and e = VZa
(c) d = /2b and c>a
(d) d>b and c =v
Transcribed Image Text:Common data for Q. 7 and Q. 8. Consider two concentric conducting spherical shells with inner and outer radii a, b and c, d as shown in the figure. Both the shells are given Q amount of positive charges. 7. The electric field in different regions are : la) Ē = 0 for r<a; =- for a <r<b: E=0 for b<r<c; E 4 TE,r -f for r>d CAREER ENDEAVOUR -f for r<a; E=0 for ar<bar4TEr for ber<e:E= zî for r<d (b) Ē =– 4περ -î for r< a; E = 0 for a <r<b; ‚Ē = 0 b<r<c;Ë = 2Q -î for r>d (c) =- 4περ (d) E = 0 for r>a; = 0 for a <r<b; =- Q zî for b<r<c; =. î for r>d 4TE,r? 2Q 8. In order to have equal surface charge densities on the outer surfaces of both the shells, the following conditions should be satisfied (a) d = 4b and c = 2a (b) d= 2b and e = VZa (c) d = /2b and c>a (d) d>b and c =v
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