In some places, insect "zappers," with their blue lights, are a familiar sight on a summer's night. These devices use a high voltage to electrocute insects. One such device uses an ac voltage of 4270 V, which is obtained from a standard 122.0 V outlet by means of a transformer. If the primary coil has 23 turns, how many turns are in the secondary coil?
The Attempt at a Solution
I'm confused about how to do this problem. I know all those formulas but I'm not sure which one to use. I'm not sure which voltage to use and what the two voltages would be. Please help. Thanks!