How does current flow in a coaxial cable in each of the following cases : 1. When the cable is connected to a DC voltage source. 2. When the cable is connected to an AC voltage source 3. When the outer metallic shield is connected to ground and DC and Ac sources are connected separately I don't understand how current flows in one direction through the inner conductor and in the opposite direction through the outer conductor-Please explain this to me with proper diagram for each of the cases (case 1, 2,3) as mentioned above.