## Answers

Q = 12 pC, d = 40 cm , r= 15 cm

E = lamda/(2pi*eo*x)

E = 2*k*lamda/x

linear charge dencity = lamda = Q/d

E = 2*9*10^9*12*10^-12/(0.4*0.15)

**E= 3.6 N/C**

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