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.
The purpose of deriving the electric field produced by a rod is to understand and quantify the strength and direction of the electric field at different points in space surrounding the rod. This information is important in various applications, such as analyzing the behavior of charged particles near the rod or designing electrical circuits.
The electric field produced by a rod can be calculated using Coulomb's law, which states that the electric field at a point is proportional to the charge of the rod and inversely proportional to the square of the distance between the point and the rod. This calculation involves vector addition, as the electric field at a point is the sum of the electric fields produced by each individual charge on the rod.
The magnitude and direction of the electric field produced by a rod are affected by the charge of the rod, the distance from the rod, and the direction of the rod (whether it is positively or negatively charged). Additionally, the presence of other charges or conductors in the vicinity can also influence the electric field.
The direction of the electric field produced by a rod is important because it determines the direction in which a charged particle would accelerate if placed in the field. This information is crucial for understanding the behavior of charged particles in the vicinity of the rod and for designing electrical systems.
Yes, the electric field produced by a rod can be negative. This would occur if the rod is negatively charged, as the electric field would point towards the rod. However, the magnitude of the electric field would still be positive, as it is proportional to the absolute value of the charge of the rod.