# Battery function in a circuit

I have a physics book that describes a battery in a circuit as like a pump that provided energy to the charge (e.g. a 1.5 volt battery gives 1.5 joules of energy to each coulomb of charge).

Am I right in assuming that the energy in a circuit is directly derived from the chemical/electrical energy generated by the battery?, Or does the battery provide the difference in emf that drives the movement of the charge?

maybe the "pump" analogy is giving me a wrong idea?

Just need to clear this up in my head 'cos I can't move on until I do

Electric circuits and their elements , and units are sometimes compared to hydronic systems. EMF = pressure, capacitor = membrane, ampere = l/sec etc The pump that provide kinetic energy, would be better compared to an electric generator. The battery, a static energy accumulator, would be better compared to an inflated air ballon.

Yuri

The battery - does it provide the power, or does it push the electrons through/around the circuit to operate the lights/heaters etc?

Hydronic e.g. - would the "batter", does it introduce water into the system or just push the water impulse)?

Because pressurised water cannot carry much energy (being incompressible), but air can (compressible), I take as example the inflated ballon. But both water and air behave as fluids - as well as electrons.
Emf is force (either in the generator, and in the battery) that forces electrons to move in a conductor. Pressure (either in the pump, and in the ballon) forces molecules to move in a pipe /duct.

Yuri

So the electrical energy generated in the battery - does it bring anything to the mix, or just provide impulse. Does it add to the flow of electricity through the circuit apart from a push?

Another point - is it true that the direction of electrons is opposite to the direction of the charge?