The electric field in a region is radially outward with magnitude E = 2r. The charge contained in a sphere of radius a = 2m centered at the origin is 4xπε 0 . Find the value of x.
Text Solution
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(16)
Given 
= 2r 
So, at radius a ⇒ 
= 2a 
= 
= 
= E a 
= E a . 4πa 2 = 2a 3 .4π
∴ q in = 
2a 3
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