How does energy travel?

  • Thread starter kodimmudi
  • Start date
  • #1
5
0
Let's say you have a DC circuit with a capacitor and a resistor.

How does electromagnetic energy flow within the system? Through the wires? In space between and around wires?

N.B. Why/how would EM energy flow in the first place?
 

Answers and Replies

  • #2
HallsofIvy
Science Advisor
Homework Helper
41,833
963
In a DC circuit, the energy travels through the circuit primarily as the kinetic energy of the moving electrons. The capacitor, where the electrons may not actually cross from one plate to another, is an exception. There the electric force of one electron, arriving at a plate, pushes an electron off the other plate. That, of course, causes the first electron to stop and the second to move so the electrical force has transfered the kinetic energy from one electron to the other.
 
  • #3
5
0
My lecturer tells me that the EM energy does not flow through the wire! I don't know what to believe, really!

Also, how is this related to Poynting's Theorem?
 

Related Threads on How does energy travel?

  • Last Post
Replies
18
Views
16K
  • Last Post
Replies
7
Views
4K
  • Last Post
Replies
19
Views
5K
Replies
9
Views
7K
  • Last Post
2
Replies
32
Views
17K
Replies
22
Views
3K
Replies
1
Views
1K
Replies
12
Views
46K
Replies
7
Views
2K
Top