The discussion revolves around the practical utility of deriving the electric field produced by a charged rod, particularly in relation to its 1/r dependence at large distances. Participants explore both theoretical and practical implications, including applications to high-voltage power lines and the distinction between static and dynamic electric fields.
Participants express differing views on the relevance and application of deriving the electric field from a charged rod, with some focusing on theoretical aspects while others emphasize practical implications. The discussion remains unresolved regarding the overall utility of the derivation.
Participants note the importance of distinguishing between static and dynamic electric fields, as well as the conditions under which the electric field behavior changes, particularly in the context of high-voltage power lines.
What is the electric field 50 feet below a 700 kV interstate high-voltage power line (= long rod)? (ac power lines are actually 3 phase).damosuz said:Is there a practical utility to derive the electric field produced by a charged rod (and the 1/r dependence at great distance)? .
At 50 or 60 Hz, the radiation (like from antenna) is minimal, so the power line problem becomes quasi-electrostatic. The high-tension power line hazard is the quasi-electrostatic field, not a radiation field.damosuz said:I meant the electric field produced by a static charge on a rod, not the intensity of the electric field in the radiation produced by the ac current in a wire (which is 1/r dependent too).
Bob S said:At 50 or 60 Hz, the radiation (like from antenna) is minimal, so the power line problem becomes quasi-electrostatic. The high-tension power line hazard is the quasi-electrostatic field, not a radiation field.