Here's a classic question on the workings of a transformer:
From the information, we can say V_{p} = 12 V, N_{p} = 200 and N_{s} = 40. Putting in the numbers:
This can easily be solved to give V_{s} = 2.4 V. But since N_{s} is exactly 5 times smaller than N_{p}, it shouldn't be a surprise that V_{s} is also 5 times smaller than V_{p}! Question: how many turns would she need on the secondary if she wanted a 24 V output?
