C

#### Chris Williams

- Jan 1, 1970

- 0

Circuits". So far (chapter 4) it seems that he has done a good job

describing all of the units and how they should be visualized except

for Joules (energy.) This he pretty much just says is "the amount of

available energy" but without making it any clearer.

It would appear that fundamentally everything boils down to 1.) the

quantity of electrons (Q), 2.) time (t), and 3.) energy (W.)

Q = Total quantity of electrons

t = time spent doing something with the electrons

W = "the amount of available energy"

So current is easy:

I = (number of electrons) / (time)

Rate at which electrons were moved (through a wire)

But voltage is problematic:

V = (W?) / (number of electrons)

Rate of "the amount of available energy" to the number of electrons

....which isn't terribly clear

Reading over the text a couple of times, and I am thinking that

voltage is the electrical version of "pressure"...?

So in water/piping terms, pressure would be a function of a) the

amount of water and b) the amount of "push" it had to make it want to

go into a pipe. Push would then be a product of gravity, mechanical

pumping, etc. So assuming that this is true then W == "Push."

Pressure = "Push"(kg) / Water(cm^2) for instance

So this allows me to understand a Volt

Voltage = "Push"(joules) / Electrons(coulomb)

But what is the electric version of "push"?

My current guess is that this is the total "negativity" or

"positivity" of a terminal on a power source. Which--in the case of a

battery say--would be the ratio of positively charged atoms to neutral

atoms in a positive electrode, or the number of free electrons to the

total number of neutral atoms in the negative electrode...?

Is this reading correct?

Thank you,

Chris Williams