Let ar, aϕ, and az be unit vectors along r, ϕ and z directions, respectively in the cylindrical coordinate system. For the electric flux density given by D = (ar 15 + aϕ 2r - az 3rz) Coulomb/m2, the total electric flux, in Coulomb, emanating from the volume enclosed by a solid cylinder of radius 3 m and height 5 m oriented along the z-axis with its base at the origin is:

Let ar, aϕ, and az be unit vectors along r, ϕ and z directions, resp

1.	Let ar, aϕ, and az be unit vectors along r, ϕ and z directions, respectively in the cylindrical coordinate system. For the electric flux density given by D = (ar 15 + aϕ 2r - az 3rz) Coulomb/m2, the total electric flux, in Coulomb, emanating from the volume enclosed by a solid cylinder of radius 3 m and height 5 m oriented along the z-axis with its base at the origin is:
A.	54 π
B.	90 π
C.	108 π
D.	180 π
Answer» E.

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