I really cannot understand this: I know through reading that unlike electric potential energy, which is charge dependent, the electric potential is purely location dependent. For example: If at a point, the electric potential is $5V$, then $1C$ of charge will have $5J$ of energy, and $10C$ of charge will have $50J$ of energy in a particular electric field. So, this is my question:
If electric potential is dependent upon position within the electric field, then why do we say that upon passing through a heavy resistor(like a bulb) in a circuit, the charge looses electric potential? Isn't this incorrect? Shouldn't a charge loose energy, instead of potential, because potential is lost constantly as the charge moves through the ciruit?
And one more question: When a charge moves through a bulb(or any heavy resistor), what happens to the electric field?
Suppose, a charge moves through a bulb, looses some energy, and again, due to the electric field, gains some energy back.
So, what effect this has on the battery? Why does a battery run out just because charge looses energy to light up the bulb(or any other appliance)? According to me, a battery should loose its "capability" of pumping charge only when the charge reaches the negative terminal. But, even when the charge is in the middle of the circuit, why does the battery looses its "pumping" capability?