Category DC Theory

Power and Joules Law Intuitively we all know what power is. A more powerful motor can turn a heavier load, or turn it faster; A more powerful torch will shine brighter; A more powerful heater will heat a larger volume…

Practical Resistors Materials Resistors can be made from a wide variety of materials. Here are some examples of the most common types produced, along with a brief description of how they are made. Wire Wound Typically made by winding a…

Resistance Resistance, as it’s name suggests, is the property of resisting the flow of electricity. In our water analogy it is the cross sectional area of the pipe along with how smooth, straight and long the inside of the pipe…

Charge and Volts To avoid a long excursion into fundamental physics and the history of it’s discovery we will accept on faith two fundamental facts: Before we go any further. Yes I am aware that this is not really how…