Make make make your personal concept of global citizenship

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

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.

Idon’t quite understand this problem