- #1
Well... i would short the voltage source first like this:gneill said:Which resistors are in parallel when the 6 V source is suppressed?
i can see the resistors are symmetric yet i still have no idea how’s the current path goes to visualize it as parallel circuit... do u mind telling me where’s the two parallel branches?scottdave said:With the middle linkage, would you agree that the voltage on the left side of the linkage is the same as the voltage on the right? So the voltage difference between the top of the circuit and the linkage are the same in the left branch or the right branch. Do you see how these two branches (top half) are parallel? In the same way, the bottom half 2 branches are parallel.
well...that's where i got stuck... i have got no idea...gneill said:Which resistors are in parallel when the 6 V source is suppressed?
So, your first task should be to read up on the characteristics of parallel resistors (or parallel components in general). What makes two components parallel? What does being connected in parallel imply for current and voltage for those components? Can you write a paragraph describing how to recognize when two components are in parallel?yecko said:well...that's where i got stuck... i have got no idea...
the two resistors are having both nodes common at the 2 ends, so they would experience same voltage difference.however, in this case,gneill said:Can you write a paragraph describing how to recognize when two components are in parallel?
Good!yecko said:the two resistors are having both nodes common at the 2 ends, so they would experience same voltage difference.
I agree with the two parallel pairs: R1 || R2 and R3 || R4. But I disagree with (R1 + R3) || (R2 + R4). Why? Because R1 and R3 are not series-connected, and neither are R2 and R4. Note that for both of these pairs of resistors, where they connect to each other that connection is not exclusive: in both cases the nodes they have in common are shared with other components as well, so the current path is not exclusive to the resistor pair, hence they do not meet the 'single current path' criteria for series connections.however, in this case,
parallel circuit pair i can identify: R1//R2, R3//R4, (R1+R3)//(R2+R4)
the 4 resistors are having 3 nodes in between, how can there be a single pair of parallel resistors to obtain the required voltage?
Look at the Wikipedia article about nodes in circuits. https://en.wikipedia.org/wiki/Node_(circuits)yecko said:the two resistors are having both nodes common at the 2 ends, so they would experience same voltage difference.however, in this case,
parallel circuit pair i can identify: R1//R2, R3//R4, (R1+R3)//(R2+R4)
the 4 resistors are having 3 nodes in between, how can there be a single pair of parallel resistors to obtain the required voltage?
The Electrician said:For extra practice try this. If the wire carrying the current Ib is replaced with a resistor Rb, does the voltage Vo depend on the value of Rb?
the current source give out fixed current while variable voltage; the voltage source give out fixed V while variable I...The Electrician said:This is not correct. Notice that the source is not a voltage source. Why does that make a difference?
yecko said:The voltage generated by the current source is larger
As resistance of the circuit increase, why is it incorrect?The Electrician said:Why does that make a difference?
A parallel circuit is a type of electrical circuit in which the components are connected in multiple branches. This means that there are multiple paths for the electrical current to flow through, allowing for the independent functioning of each component.
In a parallel circuit, each component is connected to the same two points of the circuit, creating a parallel branch. This can be done by connecting the positive and negative terminals of each component to the corresponding positive and negative terminals of the power source.
One major advantage of a parallel circuit is that if one component fails, the rest of the circuit can still function. This is because each component has its own path for the electrical current to flow through. Additionally, parallel circuits allow for the independent functioning of each component.
In a series circuit, the components are connected in a single loop, with the electrical current flowing through each component in succession. In a parallel circuit, the components are connected in multiple branches, with the electrical current splitting and flowing through each component independently.
In a parallel circuit, the total resistance is calculated by adding the reciprocals of each individual resistance and then taking the reciprocal of that sum. This is known as the "product over sum" method or the "parallel resistance formula".