Various sets of revision notes series
The good news is that this law is just a very simple concept with no complicated equations to remember. Even if you never heard of Kirchhoff, you probably already know this law intuitively. I tried really hard to think of…
Series Resistor Circuits Making further use of our analogy with water circuits. Resistors are like pipes and when you connect pipes together in series (end to end) they provide only a single path for the water. Hence they all carry…
Maximum Power Transfer Theorem This one of the simplest theorems that there are. It simply states that: Maximum power will be transferred when the internal source resistance is equal to the load resistance. This sounds counter intuitive to most people…
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…