Two coaxial cylindrical conductors are shown in cross-section above. The inner c

Question

Two coaxial cylindrical conductors are shown in cross-section above. The inner cylinder has radius a = 2 cm, length 10 m and carries a total charge of Qinner = + 8 nC (1 nC = 10-9 C). The outer cylinder has an inner radius b = 6 cm, outer radius c = 7 cm, length 10 m and carries a total charge of Qouter = - 16 nC (1 nC = 10-9 C). What is Ex, the x-component of the electric field at point P which is located at the midpoint of the length of the cylinders at a distance r = 3.8 cm from the origin and makes an angle of 30

Explanation / Answer

E=qicos/20rh....(1)
qi= 8*10^-9
cos(30)=0.86

0=8.85*10^12

r=3.8

h=10

putting the values in eq 1 we get:-

E= 3.25

Ex, the x-component of the electric field at point P = 3.25

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