How does the number of turns in a transformer change the voltage?
2016-12-10 11:00 pm
I know the magnetic field reverses 120x a second (for 60hz), but how is the voltage value "carried over" to the other coil if amperes are the only cause of a magnetic field? How is the voltage "translated" to the other coil?
回答 (2)
2016-12-10 11:21 pm
✔ 最佳答案
The magnetic field acts on each coil of the transformer. So if the magnetic field is generated by a primary with 1000 coils, and acts on a secondary with 100 coils, you get a current ratio of 1: 10. The voltage is stepped down, the current is stepped up.
2016-12-12 1:07 pm
That's physics. A changing magnetic field produces an electric field and vice versa. The voltage is determined by how many winds of wire you have in the magnetic field. The old way to steal electricity on the farm was to place a coil of wire (orientation is important) underneath a transmission line running over your property. Same principle.
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