So voltage/Current and power source questions

[pineappletree]

Because the sum of V in the system must= 0
The more resistors you have on a circuit should equal greater voltage from power source right??
This would also result in a Drop in the Current supplied


Also, The less resistance you have in a circuit the less Voltage you have...
This would also result in an increase in the current supplied



This is all correct?

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[PiBond]

Because the sum of V in the system must= 0
The more resistors you have on a circuit should equal greater voltage from power source right??
This would also result in a Drop in the Current supplied


Also, The less resistance you have in a circuit the less Voltage you have...
This would also result in an increase in the current supplied



This is all correct?

the voltage is determined by the voltage source (the battery). the current drawn from the battery is determined by the total resistance of the circuit.

let's say you have a 12V battery and two resistors (3 ohms each) in series. your total resistance is 6 ohms, thus:

V = IR
12V = I(6 ohms)
Thus you'll have 2A current drawn from the battery. Because the resistors are in series they'll both have the same current go through them. And since we said they have the same resistance they will also have the same voltage drop (6V each). We can check our work to make sure the loop sums to zero (12V from battery + -6V *2 from resistors = 0). Everything checks out.

If we added a resistor in parallel (let's say 3 ohms), the scenario will change as follows:
V = IR
12V = I(2 ohms)
Req = 1/(1/6 + 1/3) = 2 ohms
Thus we'll have 6A drawn from the battery since now our resistance has changed in our circuit. The two resistors in series will have the same voltage drop, but the resistor in parallel will not according to our loop rule. Parallel resistor has 4A of current going to it, and thus a 12V drop. The resistors in series will thus have 2A going through them and will therefore each have a voltage drop of 6V. Both loops sum to zero, so we're good.

Does that make sense?

 

[pineappletree]

Perfect sense, thank you!!!