3.9, [1] A uniform volume charge density of 80 pC/m³ is present throughout the region 8 mm < r < 10 mm. Let pv = 0 for 0 < r < 8 mm.
(a) Find the total charge inside the spherical surface r = 10 mm.
(b) Find D at r = 10 mm.
(c) If there is no charge for r > 10 mm, find D at r = 20 mm.
3.10, [1] A cube is defined by 1 < x, y, z < 1.2. If D = Zxzy ax + 3x²y² ay C/m², apply Gauss' law to find the total flux leaving the closed surface of the cube.
(b) Evaluate D at the center of the cube.
(c) Estimate the total charge enclosed within the cube by using the equation below.
3.14, [1] Let the vector field be given by G = Sx²y²z² ay. Evaluate both sides of the equation:
Charge enclosed in volume Av
volume 47
For this G field and the volume defined by x = 3 and 3.1, y = 1 and 1.1, and z = 2 and 2.1, evaluate the partial derivatives at the center of the volume.