Joke Collection Website - Mood Talk - Voltage is equal to the speed of electrons and current is equal to the number of electrons. Am I right? If not, please tell me.
Voltage is equal to the speed of electrons and current is equal to the number of electrons. Am I right? If not, please tell me.
Electrons are extremely slow.
The propagation speed of electricity refers to the propagation speed of electric field (some people say that the propagation speed of electric signals is actually the same), not the moving speed of electrons. Electrons in wires can move several meters per second (macro speed), which is already a very high speed.
The electric field travels very fast. In a vacuum, this speed is close to the speed of light.
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The propagation process of "electricity" is roughly as follows: before the circuit is connected, although there are free electrons everywhere in the metal wire, there is no electric field in the wire, and the whole wire is in electrostatic balance, and the free electrons only do irregular heat transport.
There is no directional motion, and of course there is no current in the wire. When the circuit is connected, the electric field will spread the information about the change of the field source at the speed of light, thus quickly establishing the electric field in the wires everywhere in the circuit.
Push local free electrons to drift and form current. After the switch is turned on, the free electrons start from the power supply and move directionally at the drift speed, and can only be lit after reaching the lamp. This is a complete misunderstanding.
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