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 4320 V, which is obtained from a standard 120.0-V outlet by means of a transformer. If the primary coil has 21 turns, how many turns are in the secondary coil? |
New search. (Also 5349 free access solutions) |