Thanks so much everythangcoZ!
In electrolysis and galvanic cells which electrical terminal are the anode and cathode connected to?
Also how come for electrolysis the current which has to be applied is MORE than the voltage of cell?
Hey there! In electrolysis, the negative electrode which is the cathode will be connected to the negative terminal of the power source. For the positive electrode, the anode, it will be connected to the positive terminal. So positive to positive, negative to negative. You won't have to worry about which terminal it's connected to for galvanic, as galvanic cells do not require an input of energy in order for the half reactions to occur.
As for why the voltage must be greater than the difference between the reductant and oxidant, (this might not be the best explanation - sorry!) but in electrolysis essentially what you are doing is FORCING the electron flow. In order to do this, you have to have a voltage that is greater than the voltage that would normally be produced by the cell. If the voltage is not high enough, the electrons will not be able to be forced towards the cathode.
Hope this kinda makes sense