Question

Very detailed explanation on how a battery operates. The theory in the internal resistance of batteries, how charge is created, EMF, Electrochemical reaction in batteries, etc.

Answer 1

Iff battery is already charged then as soon as the circuit complete the current start to flow from it .The internal resistance of the battery depends of the Voltage and current of the battery.The ratio of voltage to the current is internal resistance of the battery .Internal resistance is not physically present but we have to assume there is internal resistance becubec of pwer loss in battery. Charge is not created it's always present in the conductor when emf applied on it it will experience a force and start to run through the conductor .

Emf of battery is the electromotive force which drag the electrons in forward direction through the conductor and hence result in current happen .