💡Energy is transmitted through electromagnetic fields, not by electrons.
🔌The motion of electrons in the wire is only a result of the electric and magnetic fields.
⚡The energy flows from the power station to your home through the space around the conductors.
🚀The Poynting vector describes the direction of the energy flow in electromagnetic fields.
🌐Undersea telegraph cables revealed the importance of the fields in transmitting energy long distances.
Do electrons carry the energy in an electric circuit?
—No, the energy is carried by the electric and magnetic fields surrounding the wires.
How does electricity travel through power lines?
—The energy is transmitted through electromagnetic fields that propagate from the power station to your home.
What is the Poynting vector?
—The Poynting vector describes the direction of energy flow in electromagnetic fields.
Why do power lines need to be high above the ground?
—To prevent interference from the ground, which acts as a conductor and can affect the propagation of electromagnetic fields.
What did undersea telegraph cables teach us about energy transmission?
—They showed that energy is transmitted through the surrounding fields, not through the conductors themselves.
00:00Electricity is not carried by electrons, but by the electric and magnetic fields.
07:40Energy is transmitted through the space around the conductors, not through the wires themselves.
09:40Electromagnetic fields propagate from the power station to your home, carrying the energy.
10:32The Poynting vector describes the direction of energy flow in electromagnetic fields.
12:18Undersea telegraph cables revealed the importance of the fields in transmitting energy long distances.
