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Uniformly charged disk charge 
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#1
Sep411, 10:47 PM

P: 15

A uniformly charged disk has a radius of 2.6 cm and carries a total charge of 3.6*10^6C.
Find the electric field on the xaxis at a distance of 3.3mm away/ I really don't understand what I put for sigma. this is what I have so far: (sigma/2(8.85*10^.12))(1( 1/ sqrt( ( .026m^2/0.0033^2)1)) Sigma is the total charge/the area... so sigma= (3.6*10^6)/(2pi(.026)^2)=8.48*10^4 I feel like I have some part of this wrong. 


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