According to emf concept,we say that due to potential difference between electrodes of battery, electrons or charges want to move to opposite electrode. But electrodes are not joined. So they have to pass through wires. Wires act as a conducting path.
But here is contradiction, we often say that electrons in a circuit moves in random motion before potential difference is applied. And after p.d is applied they start moving.
So where do charges originate to flow? Is it in electrodes or in wires?
Please also tell why electrons in a circuit in in random motion and afterwards it starts straight moving?