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.

Consider a production line with five stations. station 1 can produce a unit in 9 minutes. station 2 can produce a unit in 10 minutes. station 3 has two identical machines, each of which can process a unit in 12 minutes (each unit only needs to be processed on one of the two machines. station 4 can produce a unit in 5 minutes. station 5 can produce a unit in 8 minutes. which station is the bottleneck station?