Electrons move inside the battery as well. Battery also has a cathode and anode. So, electrons move inside the battery as well and through the entire circuit.
From the negative terminal of battery, electrons move through the circuit and comes to the positive terminal of battery. Then chemical reactions occur inside the battery and these electrons move again to the negative terminal. But this movement is in the form of movement of ions inside batteries.
Write your answer.. toh sir conductor ke electrons move nahi karenge kya?
actually the electrons in conductor are doing random motion in conductors. The electrons ejecting from battery or cell applies the electromotive force on them
that force pushes the electrons ahead in conductor. If there will no movement of electrons in conductor, the electrons from battery will take a while to reach the point on circuit at switch. which will results in slow processing of current and the fan or light will take few seconds or minutes to run.