I just want to make sure I got the right answers for these two questions...?
2)An ideal transformer connects a 120-V source to a 12-V, 1-A load. The secondary has 90 turns. Determine the number of turns in the primary, which I got 108. And determine the source current which I think is 10A but i'm not sure...
For these two, the first one look alright to me. But, the second one. . .
The turn ratio = voltage ratio, or:
primary turns/secondary turns = primary voltage/secondary voltage
So, we would have
x/90 = 120/12
Solving this for x, we get x = 900 turns.
But, then, for the current, the proportion is a bit different. It is:
primary turns/secondary turns = secondary amps/primary amps
For this, plugging in the numbers, we get:
900/90 = 1/x
Solving this for x, we get x = 0.1 amps
Good luck, t4, I hope this helps.