OldTony

It seems to me that Professor Shercliff is really focussing on transient conditions on switching on or off dc circuits and the operation of ac circuits. I notice the diagram does not include one or more switches therefore I would assume steady state conditions would be the purpose of the question. In any case even during the transient period, as I understand it, Kirchoff's laws apply at any specific point at any specific instant of time. Whether wanted or not every circuit has some inductance and some capacitance which have their effect during the transient period of microseconds or nanoseconds, but once the transient period is over neither has an effect in the steady state.

Just to add. My understanding is that Kirchoff's laws and equations apply to ac circuits if you add " at any given instant of time".

The circuit given is a dc circuit and a radio aerial only transmits when given an ac signal to create a magnetic field. Surely in a dc circuit Kirchoff's equations hold good ?

A night on Chinese food and beer in Singapore in the 1960's would ensure an ample sample............

This kind of problem I can be solved making simultaneous equations using Kirchoff's voltage and current laws. If you search " solving problems using kirchhoff's voltage and current equations" you should find the information you need " An alternative method applicable to this type of problem is known as the superposition theorem.

In computer architecture there are two forms of OR gates providing two different functions. They are the ""inclusive OR gate" and the "exclusive OR gate." The inclusive OR function provides an output when both inputs are present: the exclusive OR does not provide an output when both inputs are present. It seems to me that it is a matter of the definition of what "or" means within the context.

English is an ever evolving language. As a schoolboy one of the books I had to study for my English literature exam was Chaucer's Prologue to the Canterbury Tales. That would have been published late in the 14th century. Many words had a different but often vaguely linked meaning to those of the present day. Perhaps it is worth mentioning that Shakespeare (1564-1616) is credited with introducing or inventing over 1,700 words!

Dear Mister President, pleased to see that you have recovered from the run of disabilities that I read in the press prevented you from serving in the military during the Vietnam war. As for Afghanistan, like many in the UK I have known someone who gave his life. He was a 19 year old friend of my grandson. It so happens his last moments were filmed and can be seen in the following video which was made by a BBC crew who were making a documentary in Afghanistan at the time. "

Return "Mein Kampf" to the library and take out " How to win friends and influence people"

Being In aimless drift, the countryside I wander and where I roam my eyes perceive in wonder arrays of life within my sphere of being. Which makes me glad to be among the living. But was it chance that brought me into being, this heady mix of thoughtfulness and feeling; elation in the marvel of existence within these many forms of life’s persistence? And why should I among these forms of living think that my life was special in the giving? A mote of dust that wanders in infinity; a moment’s glow within endless eternity.

Today I learned of white rainbows and how they can be formed.

Elvis should have followed your diet or been under your doctor!

I Have a suspicion that in their dreams Tump would like to annex Greenland, Canada and South America. Putin would like to annex Europe and the United Kingdom and the Chinese would like to annex Taiwan, Japan and Indonesia.

I think I'll stop banging my head on the wall. I look forward to the time the whole world runs on free electricity

you seem to think that your generator will be more than 100% efficient. That would allow you to construct a perpetual motion machine. To save me wasting more time why don't you google "why can't a generator power itself". BTW you have already been told the law that forbids a machine being more than 100% efficient.

Ok, I'll try to point out a few facts that may help you see the problems in your analysis. Firstly there is no difference in the basic principles of an electric motor and an electric generator. both rely on interaction between a magnetic field, electric current and movement. Fleming's left and right hand rules show the relationship between magnetic field, electric current and movement So one turns movement into electrical power and the other turns electrical power into movement. Now, in both cases the work done by the output will be less than the work done at the input. (efficiency will be less than 100%). For example if you are turning the shaft of a standard generator it will be easy if the output is not being used, but will become harder to turn if you use the out put to do work for you. i.e it will resist the movement. Thus there is no way you can position a coil that can accelerate your carriage. If an e.m.f. is created in the coil that causes current to flow it will slow down your carriage. Indeed If somehow the current could exceed a level that raised efficiency above 100% it would stop your carriage and become a motor that would push it back up the slope. Another way of explaining this is a term known as back e.m.f. I'll leave you to look that up!

You are using relative movement between a magnet and coils to generate electricity. This is the principle that is used in normal electrical generators. According to your calculations you are generating more than enough power to lift the moving part to the top of the slope and release it thus creating a perpetual motion machine. Not only that, you feel there will be a surplus of power that can be used for other purposes. You also seem to think that nobody has thought of this before. Well, many years ago when I was a young radar technician someone came up to me to see what I thought of a wonderful idea he had. The idea was to make an electrically driven car that was driven by a battery. The battery was to be charged by a generator driven by the spinning of the wheels. He could therefore travel the world for nothing. I don't think I really convinced him that it would not work and I suspect that you will not be convinced that your idea will not produce the result that you want.

There once was a fellow called Hooke I once read about in a book He pulled on a spring and noticed the thing grew longer, if one takes a look.

I see it as a question of how much energy is stored and how it is stored and then how much energy is released and how it is released. As I think everyone would agree they would be equal if there were no losses. In practice there would be some loss (less than 100% efficiency) The energy that will be stored is that which raised the centre of mass of the base to a higher level and the energy returned is that provided by the centre of mass returning to it's original, lower, level.

There are many examples of devices that do this. One familiar example is the toilet system in our homes. A trickle of water would not create enough force to lift the bowl contents over the lip of the U bend and send it on its way but a forceful gush over a few seconds will. The principle is much the same where in Wales water is pumped from a low level reservoir to a higher level reservoir to be returned when extra power is needed. ENGIE UKDinorwig Power Station | Building low-carbon energy syste...

Matter is about 99.9999999% empty space. It's quite surprising that we see each other as solid objects. Similarly the radiation from the magnetron in a microwave oven "sees" the perorated metal screen on the door as a solid sheet of metal which is just as well for our well being.

And all of this is a spin off from the organ which has as its main purpose keeping us alive long enough to reproduce before we die........................

I sometimes write a poem and this is one I wrote some time ago - it seems appropriate. Being In aimless drift, the countryside I wander and where I roam my eyes perceive in wonder arrays of life within my sphere of being. Which makes me glad to be among the living. But was it chance that brought me into being, this heady mix of thoughtfulness and feeling; elation in the marvel of existence within these many forms of life’s persistence? And why should I among these forms of living think that my life was special in the giving? A mote of dust that wanders in infinity; a moment’s glow within endless eternity.

In the words of a famous song :- "Is this the real life? Is this just fantasy? Caught in a landslide, no escape from reality" I suppose it's part of wondering what life is all about and perhaps we all wonder about that now and then.

I am wondering why you think the motor will have the full supply voltage connected to it. In other words why you think the volts drop across the capacitor plus the volts drop across the transformer primary winding will equate to zero.