JEE Main 10 April 2015 Paper

Section: Physics

Question : 14 of 90

Marks: +1, -0

A thin disc of radius b=2a has a concentric hole of radius 'a' in it (see figure). It carries uniform surface charge 'σ' on it. If the electric field on its axis at height 'h' (h < < a) from its centre is given as 'Ch' then value of 'C' is :

[Main 10 April 2015]

σ
a∊0
σ
2a∊0
σ
4a∊0
σ
8a∊0

Validate

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