Ohms Law  Amps Volts Watts Relation
The most important Electrical Law is the Ohms Law, a
proper understanding of which can help you make many
designs. Troubleshooting Home Appliances or
understanding Household Wiring is easy if you master
this.
You can Understand Electricity best with the Water
flow analogy. Volts Amps and Watts are the main
parameters that are measured and displayed in most
control panels. Electricity, Energy and Power
Systems use Digital Panel Meters to display and
control these.
Learn by building a
Voltage Level Indicator.
Volts is analogous to the pressure
of a water in an Overhead Tank. The water head or
height is like Voltage. The Pipe diameter and
bends are like wire and its resistance, a water
tap like a wirewound potentiometer. The rate of
water flowing from the tap is like the flow of
electric current in a wire.
The water drops are similar to units of charge,
the quantity of water filled in a bucket is like the
amount of charge stored in a small capacitor. The
Underground Sump can be compared to a Big capacitor.
The evaporation of water is like leakage of charge
thru the dielectric in a cap.
Riedon  High Precision Resistors at EC Blog
If you use the running water to power a home made
paddle wheel turbine; This is like simulating an
electric motor or heater in a water circuit, the
rotary power got, can be analogous to the heater's
watts.
Learn more at my schematic of
Ohmmeter to measure Resistance.
W / I

root(W * R)

V / R

root(W / R)

I * R

Volts
V

Amps
I

W / V

V / I

Ohms
R

Watts
W

V * I

W / (I * I)

(V * V) / W

(V * V) / R

I * I * R

