Question : confused about electricity and voltage

Hi

I'm confused about voltage and it would seem every person before me has also been confused about voltage if you read all the internet forums :)

From I = V/R if you increase the voltage you increase the current, so you get a greater amount of charge passing a point at a particular time. Does this mean the electrons travel faster or you get a greater quantity of electrons passing the point?

If voltage is energy per unit charge then a voltage of nV means each coloumb of charge in the circuit has nJ of potential energy (i think). As someone with a tiny bit of physics knowledge, what are the implications of each unit of charge having more energy? How does it manifest? Does this mean you can do more work as there is more current?

Presumably you need to input energy in the first place to create the voltage?

What do you mean when you talk about the power of the lamp? Does this mean how much energy the lamp is using or generating? I would have thought the lamp was using energy but I don't understand how a lamp uses energy. Is it the energy required to create the voltage which pushes the electrons around the filament in the lamp?

thanks

Answer : confused about electricity and voltage

From I = V/R if you increase the voltage you increase the current, so you get a greater amount of charge passing a point at a particular time. Does this mean the electrons travel faster or you get a greater quantity of electrons passing the point?

You will find it is a little bit of both, if you imagine you had a hose pipe, and turned the tap on halfway, you would get a steady stream of water from the other end, now if you turn the tap all the way up, you get much more water coming out of the end with a greater pressure, so because of the pressure increase and the resistance of the walls of the hose, there would be more water molecules in the same space, likewise the molecules would move faster because of the build up of pressure behind them.