1. A coaxial cable consists of an inner conducting wire encased in an insulating material surrounded by a conducting metal braid and another insulating sheath. The inner wire carries current in one direction, while the outer braid carries current in the opposite direction. Using Amp̬re۪s right-hand rule, explain why there is no significant magnetic field outside the coaxial cable. (Coaxial cables are often used to transmit cable TV and other audiovisual signals.)
2. Figure shows a picture tube that uses two solenoids to guide electrons as they move through the magnetic field.
(a) What is the orientation of the magnetic field for the two solenoids?
(b) As a result of the magnetic field, will the electrons travel toward a, b, or c?

Transcribed Image Text:

Electron path