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Both question a and b refer to the suste...

Both question `a` and `b` refer to the sustem of charges as shown in the figure. `A` spherical shell of conducting material. `A` point charge ` +Q` is place at the centre of the spherical shell and a total charge `-q` is placed on the shell. `A` Charge `-q` id distributed on the surfaces as
.
(b) Assume that the elctrostatic potential is zero at an infinite distance from the spherical shell . The electrostatic potential at a distance ` R (a lt R lt b)` from the centre of the shell is .

A

`0`

B

` (KQ)/a`

C

` K (Q-q)/R`

D

` K(Q-q)/b (wnere K= (1)/(4 pi varepsilon_0))`

Text Solution

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The correct Answer is:
B, D
(a) To. Make electric field indide metal charge on iner surface of shell must vbe equal to -Q

` V_p = (KQ)/R - (KQ)/R + (K(Q-q))/b = (K(Q-q))/b`
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