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  4. In a spherical distribution, the charge density varies as ρ (r)=A/r for a < r < b (as shown) where A is a constant. A point charge Q lies at the centre of the sphere at r=0 . The electric field in the region a < r < b has a constant magnitude for <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/p-6bnb8unwce8q.png />

Q. In a spherical distribution, the charge density varies as for (as shown) where is a constant. A point charge lies at the centre of the sphere at . The electric field in the region has a constant magnitude for

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Solution:



For = constant,

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