- #1
denniszhao
- 15
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- Homework Statement
- Poynting vector
- Relevant Equations
- attached below in pic
I don't know which part gets wrong
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I got 3.3uW which is same as the given answer but the derivation isn't correct thomitochan said:Hi. How much W does your result show ?
The Poynting vector is a mathematical concept used to describe the direction and magnitude of electromagnetic (EM) energy flow. It represents the rate at which EM energy is transmitted through a given area. In the context of power transmission, the Poynting vector can be used to calculate the amount of EM power transmitted down a coaxial cable.
The Poynting vector can be calculated using the formula: S = E x H, where S represents the Poynting vector, E is the electric field vector, and H is the magnetic field vector. This formula takes into account the direction and magnitude of both the electric and magnetic fields, as they are both necessary for the transmission of EM energy.
A coaxial cable is a type of transmission line that is made up of two conductors separated by an insulating material. It is commonly used to transmit high-frequency signals, such as those used in radio and television broadcasting. In the context of EM power transmission, a coaxial cable is used to carry the EM energy from the source to the destination.
The Poynting vector represents the rate at which EM energy is transmitted through a given area. In the case of a coaxial cable, the Poynting vector can be used to calculate the amount of power transmitted down the cable by integrating its magnitude over the cross-sectional area of the cable. This calculation takes into account both the electric and magnetic fields, as well as the properties of the cable itself.
Yes, there are several factors that can affect the Poynting vector and EM power transmission through a coaxial cable. These include the frequency of the EM signal, the length and diameter of the cable, the type and quality of the insulating material, and any interference or losses that may occur during transmission.