- #1

thegreengineer

- 54

- 3

**electronics**and I've seen several new concepts such as

**ohm's law**,

**parallel and series circuits, what's AC and DC**and many other topics.

Ok, I have no doubt on what's direct and alternate current or what a series and parallel circuits are; rather than that my main doubts focuses on how electric circuits formulas are used.

To clear this I'll put an example:

*I connect three resistors in parallel, the first is a 3 Ω resistor, the second is a 6 Ω resistor, and the third is a 10 Ω resistor. They are connected in such circuit with a battery of 5 V. The current is worth 10 A.*

If I had this as an example:

Question #1. Knowing that this is a parallel circuit and hence the total electric resistance is calculated through (in this case):

[itex]\frac{1}{R_T}=\frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}[/itex]

Where does the total electric resistance fit? What does it represent?

Question #2. Supposing that I needed to calculate the voltage on each resistor

Does the voltage on each resistor need to be calculated with the ohm's law? I mean for example if I needed to calculate the voltage on the 6 Ω resistor I would use

**V=IR**; however is the current to be used in the previous formula 10 A or must be calculated through [itex]I_T=I_1+I_2+I_3[/itex]?

Sorry if this may sound annoying for some people, I'm learning and this has been always hard for me. Thanks.