- #1
user111_23
- 84
- 0
I see some devices have voltage and amperage ratings on them. Are these just the recommended operating conditions? Or are they something else?
Also, how do engineers determine how much voltage and current does a circuit need?
I see ratings for resistivity as well. Why does resistivity matter in, say, a vacuum cleaner?
Also, how do engineers determine how much voltage and current does a circuit need?
I see ratings for resistivity as well. Why does resistivity matter in, say, a vacuum cleaner?