how much power would be needed to using a electromagnet move 2 litres of water 2 inches?

Question

thats upwards or downwards not side to side

Answer 1

I have the feeling that this is a catch question....because you can't move water with a magnet (oh sorry, the moon can = tides, but that's not really "magnetism doing it....)
You can, if you put the water in a steel container. Then add the mass of the water ( = 2Kg in your case) AND the mass of the steel container, and do the math. (No time to do that for you).

Answer 2

first of all..WHY???

if the water is in metal container then not much power at all...if its free standing water...you going to need a lot of jucie to move it 2 inches