Electricity.. I think I understand it now, please check if I am correct?

Question

Ok so lets say we have a battery and a light globe in a circuit.. The battery (a source of EMF) has a large concentration of positive charge at one end and a large concentration of negatve charge at the other. Through pushing for example the negative charges (electrons) together against the forces of repulsion to one end, the work done to do this is stored as EMF or electric potential. Thus both charges (positive and negative) at each side of the battery have electric potential energy (pushed against forces of repulsion to each side).

This is how each unit charge gets electric potential energy or EMF - through the process of charge concentration.

This charge concentration causes positive and negative electric fields to be formed on each side. This pushes the electrons around the circuit to the other end as they experience a force of attraction. They already have electric potential, this just moves the charges. The light bulb glows.

10 points for best answer. Thanks in advance

Answer 1

I hope the site below makes things much clearer to you.

the light bulb is a resistor which glows because the filament is heated.

Answer 2

you....are....right....

Answer 3

You might think so, but the electrons do not individually move right round the circuit. Think about the electrons free to float around in the conductor being like a gas, and electricity as a sound wave passing through it.

Each electron may only move a few cm but the electric field travels thru copper wire at 1/3 speed of light as soon as the circuit is connected.

Answer 4

Actually in the battery one side has the ability to give electrons and the other side has the ability to take them .this is what potential difference is.because of this the electrons move opposite to the direction of the conventional current.this makes the light bulb glow.

Answer 5

The battery works through a chemical reaction where positively charged ions in one cell want to steal electrons from another material in another, but can only do so when they are connected with a wire.

The voltage (or electrical potential) relates to how strongly the ions will grab at the electrons in the other cell. The higher the potential, the higher the current you could get in the circuit.

Answer 6

It might be better to neglect EMF while considering a battery (and consider EMF and back EMF when considering motors).  Consider a battery as a source of electrical pressure (much like water pressure).  The pressure always exists at the terminal of the live battery but nothing (electrons) flows until an external circuit is completed (like adding water pipes to a pump and reservoir).  Chemical reactions within the common battery produce a concentration (cloud) of electrons on one of the battery plates that repel each other and wish to flow to the other plate that lacks electrons.  The easiest path for the electrons is through an external circuit.  When you add a circuit (containing a light bulb) the electrical pressure of the battery (voltage) pushes electrons into the circuit and that shoves electrons all along the line (even through the light bulb) until an equal number of electrons are shoved back into the opposite pole of the battery.  The flow of electrons (current) is possible because every element in the circuit contains atoms and molecules that possess a cloud of losely held orbiting electrons that are easily pushed along.  A good insulator has closely held electrons that strongly resist the flow of electrons.  Even though the light bulb filament allows electrons to flow the resistance to flow is so great that much of the energy of the electrons is converted to incandescent heat and the bulb glows.  Although the 'shove' proceeds at nearly the speed of light individual electrons may pass along relatively slowly (like people walking through a wide corridor who must shove their way through a narrow doorway (bulb filament).  Ten people enter the corridor and ten must leave at the other end but all move along at least a little.  The ten passing through the filament feel the most friction.