Transformers???

Short, sweet, and correct.

Merry Christmas.

There is no directional nature to a transformer. The designation of primary and secondary is an arbitrary designation set by where the power source resides. This capability is used in many communication circuits used today. The most common use of this is the parasitic communication done over the power lines. For those who prefer a non-Wikipedia link there's this 1988 patent paper.

How far should one go in tempering the wind to the shorn lamb? This question is part of a suite of like questions over the last two years, with not much increase in sophistication during the whole time.

Of course, even the primary student must start somewhere, but shouldn't a little progress be expected?

Mr Tornado, GA and in words ....the like of which I haven't seen in ages. Thank you for all the intelligent answers. I have been able to glean insight from.....your previous postings. Seasons Greetings, Ray

Transformer secondary load change reflects in change is primary winding current is easy way to know that secondary causes effect on primary.

The flux or magnetic filed in the secondary does affect and induce currents in the primary. This can change the input impedance of the primary as set by the load in the secondary. ron

Change impedance of primary??? NO. Load resistor at secondary can not alter inductance of primary. It can not change resistance of primary and it can not change coupling capacitance also. There is induced energy source from secondary current to primary which is responsible for change in current in primary and perhaps you can call it a virtual impedance change but not a real one.

I think you want to says that all impedances in transformer driven loads get connected in parallel to form a total load on primary power sourcing coil. That sounds reasonable.

It does, which is why the impedance seen at the primary depends on the impedance in the secondary circuit (the ratio is the square of the turns ratio - because the current steps down and voltage steps up or vice versa). For example, a 2:1 step down transformer with 10 ohms in the secondary circuit would appear as 40 ohms in the primary circuit.

It does! Both impose on each other, that is if you lower current in secondary that lower current in primary and if you increase current consumption in secondary that would increase current in primary, therefore not loaded secondary minimizes current in primary.

it does. AC current inducess a counter electromotive force.

if it was DC amps = voltage over resistance. 120 volts, divided by 60 ohms equals 2 amps. if not for CEM force, it would equal 60 amps. a 1/4 horse hp moter, like a washing machine does not need a 60 amp feed. look at your moter and see what the voltage is, use a multi meter when there is no power and see what you get. if not for CEM force. numbet twelve wire would be to small. look at the size of the wire to the motor. double the voltage, half the amps and you get the same watts.

lenz's law says it does.... Remember the formula N1/N2=V1/V2=I2/I1?

Transformer is a typical application of electromagnetic induction. A change in flux brings about change in current and vice versa. Since the transformer is a magnetically coupled device any change in magnetic flux in its primary will bring about corresponding change on the seconadry current & flux and likewise from secondary to primary. Therefore, it should and it does. How much is a matter of analytical calculation. What makes you think it doesn't?

BBRaina