Two spherical shells are as shown in figure.
Let r be the distance of a point from their common centre. Then, match the following columns and mark the correct choice from the given codes.
Column-I Column-II
i. Electric field for r < R₁ p. is constant for q₂ and vary for q₁
ii. Electric potential for r < R₁ q. is zero for q₂and vary for q₁
iii. Electric potential for R₁ < r <R₂ r. is constant
iv. Electric field for R₁ < r <R₂ s. is zero
Codes:

Moderate

Solution

For r < R, E = 0 as no charge is inside region r < R₁
$∴$ E = 0 at all points
$For r < r_{1}, \frac{dV}{dx} = - E = 0$
⇒ V = constant for r < R₁
For R₁ < r < R₂, potential is constant for q₂ as point lies inside the sphere of radius R₂.
Also, for R₁ < r < R, charge q₂ does not contribute to the field as it lies outside the surface.

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SCAN ME

	Column-I		Column-II
i.	Electric field for r < R₁	p.	is constant for q₂ and vary for q₁
ii.	Electric potential for r < R₁	q.	is zero for q₂and vary for q₁
iii.	Electric potential for R₁ < r <R₂	r.	is constant
iv.	Electric field for R₁ < r <R₂	s.	is zero