34. Electric Field of Charged Ring

34. Electric Field of Charged Ring - Electric Field of...

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Unformatted text preview: Electric Field of Charged Ring Total charge on ring: Q Charge per unit length: = Q/2a Charge on arc: dq dE = kdq kdq = 2 r2 x + a2 Ex x kxdq dEx = dE cos = dE = 2 (x + a2 )3/2 x 2 + a2 Z kx kQx dq Ex = 2 Ex = 2 (x + a2 )3/2 (x + a2 )3/2 |x| a : Ex kQx , a3 a : Ex x0 = a/ 2 x kQ x2 -x 0 x0 x (dEx /dx)x=x0 = 0 tsl34 p.1/1 ...
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