What is water potential???​

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

Which configuration would produce an electric current? a) rotate a coil of copper wire between two magnets. b) connect a wire between a copper and zinc strip sitting in a beaker of water. c) connect a wire to the (+) positive end of a battery and the other end to a light bulb. d) connect a wire to the negative end of a battery and the other end to a light bulb.

Could someone me find the answer to this problem.