Why does the rms of alternating current equal the value of dc in a dc circuit for the same power?
Alternating Currents Watch
- Thread Starter
- 16-01-2017 18:00
- 17-01-2017 17:23
If you're unsure with what he says, ask me and I'll try to clarify it
- Study Helper
- 17-01-2017 17:24
In other words, the r.m.s. value of a time varying non-uniform amplitude/frequency a.c. signal is such that an equivalent d.c. value would produce the same power dissipation in a given load.
It's a bit like saying the power output of a horse ploughing various fields in different weather conditions averaged over a time period is the equivalent of a 750W d.c. motor operating continuously with a constant load.
The former is hard to define without quoting complex measurement conditions, the latter is almost trivial and simplifies analysis and computations.Last edited by uberteknik; 17-01-2017 at 17:35.