SOLUTION: A device need 5.00A at 7.00V.this is connected to a transformer with 1800 turns in the primary coil of wire and a 220V.What is the ratio of secondary turn to primary turn for this

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: A device need 5.00A at 7.00V.this is connected to a transformer with 1800 turns in the primary coil of wire and a 220V.What is the ratio of secondary turn to primary turn for this       Log On


   



Question 1053704: A device need 5.00A at 7.00V.this is connected to a transformer with 1800 turns in the primary coil of wire and a 220V.What is the ratio of secondary turn to primary turn for this transformers?how many turns should the secondary coil of wire have?

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Secondary to primary turns =
+7+%2F+220+
+7+%2F+220+=+n+%2F+1800+
+7%2A1800+=+220n+
+220n+=+12600+
+n+=+57.273+ turns in the secondary coil