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4 votes
Accepted

Charge conservation in ohmic material - Apparent paradox

Differential problems are defined in a domain and require boundary conditions, and the solution to be "regular enough" for the differential equations to hold. If you're dealing with a body ...
basics's user avatar
  • 10.5k
4 votes
Accepted

Potential difference when two emf sources are connected in a simple loop circuit

What you have to remember is that for a resistor the current always flows from one node to another at a lower potential. Thus when the current trough a cell is reversed (the difference between a cell ...
Farcher's user avatar
  • 97.8k
2 votes

Why is my idea of voltage drop wrong?

To simplify matters, assume that the mobile charged particles under consideration are positive and ignore the thermal motion of the charged particles. I am going to compare the motion of a charged ...
Farcher's user avatar
  • 97.8k
2 votes

Why is my idea of voltage drop wrong?

Voltage drop means voltage loss, typically in the context of electrical current flowing through a series of resistors or a piece of resistive wire. Let's say we have a loop of resistive wire leading ...
niels nielsen's user avatar
2 votes
Accepted

Doubts in circuit analysis

Maybe I am loosing some detail here, but assuming that all resistances are equal, and looking at the symmetry of the circuit, all dpps and currents should be the same in module if you flip the circuit ...
ebenezer's user avatar
  • 130
2 votes

Why is current the same when batteries are connected in series?

I struggle to understand why the current remains the same when batteries are connected in series. The same as what? The same as when the two batteries are connected in parallel? That premise of your ...
KDP's user avatar
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1 vote
Accepted

Visualization of resistance

What does a resistor do in an electrical circuit? The resistance of a conductor limits the amount of current that can flow in the conductor for a given potential difference. I have been told to ...
Bob D's user avatar
  • 73.5k
1 vote

Visualization of resistance

I have been told to think of water flowing in a pipe and which has a narrow part I don't think the narrow pipe is a good analogy of a resistor. In simple fluid dynamics the water in the narrow part ...
gandalf61's user avatar
  • 56.1k
1 vote

Why is current the same when batteries are connected in series?

First, when we say "the current is the same when batteries are connected in series" we mean that the current through battery 1 is the same as the current through battery 2. We don't mean ...
The Photon's user avatar
  • 28.1k

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