The new generator no effect counter B. EMF part 2 ( Selfrunning )

[TinselKoala]

Analogies have their limits and all break down at some fine level of analysis. This doesn't make them less useful in the levels where they do apply, though. The hydraulic analogy applies to the Ohm's Law quantities, and to a certain degree with capacitance and higher-order phenomena like resonance, and starts to break down when magnetic effects come more into consideration. I don't think there is anything in the hydraulic analogy that properly describes induction, but the analogy works well enough when people are trying to visualize and understand the basics of current, resistance, voltage, etc.
What's astounding is that even our best description of what is happening with electromagnetism is also analogy. For example, the photon: It is _like_ a particle, it is _like_ a wave... but the truth is perhaps much deeper than that. Analogies are useful tools and sometimes they are the best or even the only way we have of thinking about physical entities like photons or electrons, atomic particles or forces of interaction. Field? Analogy it is.

[NoBull]

This is a hydraulic analogy of an inductor.

This was an animated GIF but this forum's software converted it and kept only its first frame 
Somebody talk to Stefan about it - if you know him.

[MileHigh]

Analogies have their limits and all break down at some fine level of analysis. This doesn't make them less useful in the levels where they do apply, though. The hydraulic analogy applies to the Ohm's Law quantities, and to a certain degree with capacitance and higher-order phenomena like resonance, and starts to break down when magnetic effects come more into consideration. I don't think there is anything in the hydraulic analogy that properly describes induction, but the analogy works well enough when people are trying to visualize and understand the basics of current, resistance, voltage, etc.
What's astounding is that even our best description of what is happening with electromagnetism is also analogy. For example, the photon: It is _like_ a particle, it is _like_ a wave... but the truth is perhaps much deeper than that. Analogies are useful tools and sometimes they are the best or even the only way we have of thinking about physical entities like photons or electrons, atomic particles or forces of interaction. Field? Analogy it is.

TK:

This is where MileHigh's "Physical Systems" course circa 1980-81 comes into play.

For starters, we are not going to be nit-picky about fine details here.  It's the general concepts that are the most important things and you don't want to take your eye off of the ball.  In that sense there is no breakdown at all.

Again, the context is voltage, current, power, energy.  Water is a perfect analogy for electricity.  Note we are _not_ talking about the magnetic field.  When you work on your bench are you waving a Hall sensor all over the place?

The hydraulic analogy applies to the Ohm's Law quantities, and to a certain degree with capacitance and higher-order phenomena like resonance, and starts to break down when magnetic effects come more into consideration.

Resistance, capacitance, inductance, and resonance are all _perfectly_ modeled "in water" and you don't need the big contraption that NoBull showed in the graphic, even though that is also valid.

Chet:  Talk straight - learn to say "I don't know."

Anyway, the reason this topic is here is because Epwpix said, "Oliver Heaviside said it's not true."  It is true and I asked him to comment.

MileHigh

[NoBull]

Allow me to pose a thought experiment, based on the fact that magnetic fields propagate at finite speeds.
Consider three single-loops of wire, A-B-C with A (to the right) and C (to the left) separated by a distance L from B, axes co-linear.
Initially, none is carrying a current and all three are stationary in the lab frame, on a fixed frame which however is free to move.
Then one sends a current through B in a short pulse such that it is OFF when any return field comes back from A and C.  Shortly before the magnetic field from B arrives, short current pulses are sent into coils A and C in directions such that the arriving B-field will push A to the right and will also push C in the same direction.  Then these currents are also quickly shut off.

This is a very good question and a difficult one.
To answer this, it is necessary to know how quickly the near field magnetic field propagates.
I always wanted to measure this speed but I run into practical engineering difficulties.

...there are some that believe that the non-radiative near field interactions are instantaneous, and allegedly a team of Chinese scientists has made a 72g thruster by bouncing microwaves in a CLOSED! container based on this principle

http://www.wired.co.uk/news/archive/2014-07/31/nasa-validates-impossible-space-drive
and
http://www.emdrive.com/yang-juan-paper-2012.pdf

[tinman]

Analogies have their limits and all break down at some fine level of analysis. This doesn't make them less useful in the levels where they do apply, though. The hydraulic analogy applies to the Ohm's Law quantities, and to a certain degree with capacitance and higher-order phenomena like resonance, and starts to break down when magnetic effects come more into consideration. I don't think there is anything in the hydraulic analogy that properly describes induction, but the analogy works well enough when people are trying to visualize and understand the basics of current, resistance, voltage, etc.
What's astounding is that even our best description of what is happening with electromagnetism is also analogy. For example, the photon: It is _like_ a particle, it is _like_ a wave... but the truth is perhaps much deeper than that. Analogies are useful tools and sometimes they are the best or even the only way we have of thinking about physical entities like photons or electrons, atomic particles or forces of interaction. Field? Analogy it is.

The venturi effect can be used to replicate induction,and the inertia of the water flow in the pipes can be used as the magnetic field produced by current flowing through a wire/inductor.

Anything can be replicated with water flowing through pipe's that can be done with power flowing through wires. Pulse motor's,inductive kickback systems--you name it,it can be done with water.